Patent Publication Number: US-9428560-B2

Title: Protein comprising truncated form of extracellular region protein of Frizzled 2, and pharmaceutical composition for treating bone diseases which comprises said protein

Description:
TECHNICAL FIELD 
     The present invention relates to a novel protein comprising a truncated form of an extracellular region protein of Frizzled 2 which has a high degree of secretion activity in production cells (also referred to as productivity) and/or bone mass-increasing activity when compared to a known protein comprising the extracellular cysteine-rich domain of Frizzled 2, and a pharmaceutical composition for treating bone diseases comprising the protein. 
     The present invention also relates to manufacturing methods of a novel protein comprising a truncated form of an extracellular region protein of Frizzle 2 which has a high degree of secretion activity in production cells and/or bone mass-increasing activity when compared to prior art proteins comprising an extracellular cysteine-rich domain of Frizzled 2, and a pharmaceutical composition containing the protein used for treatment of bone diseases. 
     The present invention also relates to therapeutic methods of bone disease using a novel protein comprising a truncated form of an extracellular region protein of Frizzled 2 which has a high degree of secretion activity in production cells and/or bone mass-increasing activity when compared to prior art proteins comprising an extracellular cysteine-rich domain of Frizzled 2, and a pharmaceutical composition containing the protein used for treatment of bone diseases. 
     These findings have been discovered based on the preparation of production cells for a protein comprising a truncated form of an extracellular region protein of Frizzled 2, and the characterization of mice to which the protein is administered. 
     BACKGROUND ART 
     A super-aging society has arrived, the number of people with osteoporosis has increased, and bone fractures resulting therefrom have come to constitute a serious issue of concern at a societal level. In particular, patients with femoral neck fractures and vertebral body fractures become bedridden, which causes significant deterioration of the quality of life thereof, and the social, medical, and economic burdens caused by care and hospital treatment have increased (Non-Patent Literatures 1 and 2). 
     It has also been discovered in recent years that osteoporosis is significantly associated with mortality in old age (Non Patent Literatures 3 and 4). Under such circumstances, prevention and treatment of osteoporosis have become critical objectives to be achieved. 
     Osteoporosis (i.e., a pathological condition where bone mass is reduced while the rate of the amount of the bone matrix to the amount of the mineralized bone matrix is held) is classified as primary osteoporosis or secondary osteoporosis. The former type is a pathological condition heretofore referred to as postmenopansal osteoporosis or senile osteoporosis. The latter type is a pathological condition caused by changes in bone metabolism resulting from other diseases, and such osteoporosis is classified based on the cause thereof, such as osteoporosis caused by endocrine, nutritional/metabolic, inflammatory, immobile, drug-induced, hematologic, congenital, or other diseases. 
     According to the above classification, endocrine causes include such as hyperparathyreosis, hyperthyreosis, hypogonadism, Cushing&#39;s syndrome, somatotropin deficiency, diabetes, Addison&#39;s disease, and calcitonin deficiency. 
     Nutritional/metabolic causes include such as chronic degenerative diseases, emaciation, serious liver diseases (primary biliary cirrhosis, in particular), gastric resection, scorbunts, malabsorption syndrome (including celiac disease), hypophosphatemia, chronic renal disease, hypercalciuria, hemochromatosis, amyloidosis, mast cell tumor, ingestion of excess sodium, insufficient calcium intake, and hypervitaminosis D or A. Inflammatory causes include such as articular rheumatism, particular bone disease (elevated bone resorption induced by proinflammatory cytokines), and sarcoidosis. 
     Immobility-related causes include such as systemic, bed rest, paralysis, local, and post-fracture causes. Drug-induced causes include such as with the use of steroids (steroids are extensively used for inflammatory diseases as immunosuppressive agents; examples of diseases treated with the use of steroids include collagen diseases, asthma, inflammatory bowel diseases, and in the case of organ transplantation, and bone loss is a serious side effect of such therapy), methotrexate, heparine, warfarin, anticonvulsant agents, lithium, and tamoxifen. 
     Blood-disease-induced causes include such as multiple myeloma, lymphoma, leukaemia, hemophilia, and chronic hemolytic diseases. Congenital causes include such as dysosteogenesis, Marfan&#39;s syndrome, Kleinfelter&#39;s syndrome, congenital erythropoetic porphyria, and cystic fibrosis. 
     Other disease-induced causes include such as with chronic obstructive lung diseases, hepatic failure, renal diseases, articular rheumatism, pregnancy, hyperoxemia, and HIV infection (Non-Patent Literature 5). 
     Among the above-mentioned diseases, bone diseases resulting from osteoarthritis, articular rheumatism, malignant tumors, or renal diseases are specifically regarded as bone diseases that impose serious influences at the societal level, in addition to primary osteoporosis. Osteoarthritis develops most often in locomotor regions. The number of patients afflicted therewith is said to be 10,000,000 in Japan, and it has been deduced that the number of patients will keep increasing as the aging of society advances. Advanced articular disorders are treated via artificial joint replacement; however, radical treatment of moderate or milder symptoms has not yet been reported (Non-Patent Literature 6). 
     Articular rheumatism is a chronic and progressive inflammatory disease characterized mainly by multiple arthritis. Articular synovial proliferation gradually causes infiltration of cartilage or bones in the vicinity thereof, and articular rheumatism often leads to destruction and deformation of joints. It has been reported that treatment with the use of an antirheumatic drug (methotrexate) cannot sufficiently inhibit the progress of joint destruction, and a biological agent targeting a tumor necrosis factor (TNF) α produces significant effects of inhibiting joint destruction. Thus, it is considered to be a revolutionary agent. However, increased incidence, as a side effect, of opportunistic infection, tuberculosis (extrapulmonary tuberculosis), Pneumocystispneumonia, or the like when using such agent is an issue of concern (Non-Patent Literature 7). 
     Major examples of bone diseases involved in malignant tumors include hypercalcemia and bone metastasis related to malignant tumors. Hypercalcemia causes loss of appetite and diuresis, and it causes dehydration and renal failure caused thereby. Bone metastasis is often observed in patients with breast cancer, prostate cancer, or lung cancer, in particular. While bone metastasis is hardly ever fatal by itself, it causes bone ache, pathologic fracture, neuroparalysis, or the like. It thus often significantly deteriorate patients&#39; QOL, and bone metastasis control is a critical objective in clinical settings (Non-Patent Literature 8). These bone diseases related to malignant tumors are treated with the use of bisphosphonate preparations, although the problem of side effects has been pointed out. 
     Among bone diseases related to renal diseases, a pathological condition of bone damage caused by renal tissue damage is referred to as renal osteodystrophy. Bone disease experienced by kidney dialysis patients are mainly caused by secondary hyperparathyreosis. Because of the elevated PTH concentration caused by hyperparathyreosis and, for example, insufficient production of bone morphogenetic protein (BMP) 7, renal osteodystrophy advances. Dialysis patients often exhibit lowered reactivity of the bone with the parathyroid hormone (PTH). When the PTH concentration is chronically and significantly elevated, accordingly, fibrous ostitis (high bone turnover) develops. When the PTH concentration is maintained within a standard range, in contrast, bone aplasia (low bone turnover) develops. 
     When fibrous ostitis advances, collagen fibers are irregularly formed, such fibers are mineralized as non-crystalline calcium phosphate, and woven bone is then formed. This enhances bone formation, although the bone becomes easily fracturable. Basic treatment of fibrous ostitis involves inhibition of parathyroid hormone secretion, which mainly entails calcium ingestion and administration of active vitamin D. 
     When a patient has a chronic kidney disease (CKD) and receives dialysis treatment, in particular, various regulations, such as restrictions on food or water intake, are necessary. When secondary hyperparathyreosis advances, hypercalcemia also becomes an issue of concern. When prescribing active vitamin D, extreme caution, such as via the monitoring of renal functions (i.e., serum creatinine level) and serum calcium level, is always required. 
     Bone aplasia develops because of prolonged use and excessive administration of active vitamin D preparations or suppression of parathyroid hormone after parathyroidectomy (PTX). The rate of fractures associated with bone aplasia is higher than that associated with fibrous ostitis, and it induces hypercalcemia or mineralization of blood vessels or other soft tissues. Thus, adequate treatment techniques have been desired. A pathological condition of bone aplasia is low bone turnover in which bone resorption and bone formation are inhibited, and there is no established treatment technique at present (Non-Patent Literature 9). 
     Hyperphosphatemia or hypercalcemia caused by lowered capacity of the bone for phosphorus or calcium intake (low-turnover metabolic bone) or lowered storage capacity (high-turnover metabolic bone) is considered to be a cause of ectopic (vascular) mineralization. Cardiovascular complications account for 40% or more of the deaths of patients with chronic renal failures, and dialysis patients in particular, and arteriosclerosis involving vascular mineralization has drawn attention as a serious pathological condition. Treatment of mineralization of advanced lesions in patients with chronic renal failures remains difficult at present and the prognosis thereof is poor (Non-Patent Literature 10). 
     In addition to agents for treating primary osteoporosis, accordingly, development of agents that more effectively act on bone diseases resulting from osteoarthritis, articular rheumatism, malignant tumors, or renal disease and vascular mineralization resulting from bone diseases with reduced side effects has been desired. 
     It is considered that bone metabolism is regulated by the balance between osteoblast functions and osteoclast functions, and osteoporosis develops when the bone-destroying activity exceeds bone-building activity (Non-Patent Literature 11). In particular, secretion of the female hormone that assumes the role of protecting bones is lowered in postmenopausal women, a lowered capacity of osteoblasts for bone formation and the elevated bone resorption activity of osteoclasts are consequently observed, and it is highly likely that symptoms of osteoporosis would develop (Non-Patent Literatures 12 and 13). 
     In order to overcome such problems, estrogen preparations have been used; however, application thereof has been restricted due to the increased risk of thrombosis and breast cancer caused by the use of such preparations. It is also reported that use of a selective estrogen receptor modulator would increase the risk of deep vein thrombosis (Non-Patent Literature 14). 
     At present, calcitonin, bisphosphonate, and the like are used as agents that inhibit the bone resorption activity of osteoclasts. Calcitonin is known to bind to a calcitonin receptor expressed on the osteoclast surface to inactivate osteoclasts, and it is used for treatment of not only osteoporosis but also hypercalcemia, Paget&#39;s disease of bone, and the like in clinical settings. 
     However, no effects thereof on bone fracture inhibition have yet been found, and calcitonin receptor expression is reported to be down-regulated by calcitonin administration (Non-Patent Literatures 14 and 15). Bisphosphonate exhibits potent bone resorption inhibitory activity, and amino-containing bisphosphonates, such as andronate and risedronate, are major therapeutic agents for osteoporosis in Japan. Such bisphosphonate preparations inhibit farnesyl diphosphate synthase, block lipid protein prenylation, and induce inhibition of bone-resorption functions and osteoclast apoptosis (Non-Patent Literature 16). 
     However, the FDA warned of crises of severe skeletal, articular, or muscular pain in 2008 as problems of bisphosphonate preparations. In addition, side effects, such as jaw bone necrosis, caused by the prolonged use thereof (i.e., for 2 or 3 years or longer) after dental care have been reported (Non-Patent Literature 17). 
     An anti-RANK antibody has been expected as a novel osteoclastic inhibitor other than those described above. Further, application of the anti-RANK antibody as an inhibitor of articular destruction in the case of articular rheumatism or as a therapeutic agent for multiple myeloma has been expected, and clinical development thereof is in progress. 
     Based on a report to the effect that the RANKL/RANK pathway is important for the survival and maintenance of dendritic cells (Non-Patent Literature 18), or a report to the effect that lymph node dysplasia is caused in an RANK- or RANKL-deficient mouse (Non-Patent Literatures 19 and 20), the influence of an anti-RANK antibody preparation on the immune system has become an issue of concern. 
     In 2008, AMGEN reported that an increased rate of development of some infectious diseases was found through a clinical test of the anti-RANK antibody preparation (Denosumab). As a result of the clinical test of the anti-RANK antibody conducted in 2009, development of jaw bone necrosis was found to be a side effect, as in the cases of the bisphosphonate preparations. 
     Treatment via intermittent administration of PTH alone as an osteogenesis accelerator that activates osteoblasts has been conducted (Eli Lilly, teriparatide), but such agent is not different from other therapeutic agents, such as bisphosphonate preparations, in that activity of increasing cortical bone thickness is not very high compared with activity of increasing cancellous bone mass. 
     Accordingly, the effects thereof for bone fracture prevention are not considered to be very high. In relation to PTH, further, Asahi Kasei Pharma Corp. (Japan) has reported problems, such as side effects such as palpitation, tachycardia, and a lowering in blood pressure, and osteosarcoma observed in a long-term administration test to rats, unapproved continuous use thereof for 1.5 to 2 years or longer in Europe and the United States, and prohibited application thereof to cancer patients. Thus, it is impossible to use PTH for inhibition of cancer bone metastasis, treatment of cancer induced hypercalcemia (paraneoplastic humoral hypercalcemia or local osteolytic hypercalcemia caused by the parathyroid-hormone-related peptide produced by tumor cells), or other purposes. 
     Accordingly, development of agents that more effectively work for osteoporosis caused by the lowered capacity of osteoblasts for bone formation or elevated bone resorption activity of osteoclasts in postmenopausal women, hypercalcemia, Paget&#39;s disease of bone, inhibition of bone metastasis, inhibition of articular destruction associated with articular rheumatism, or multiple myeloma with reduced side effects has been awaited. 
     In addition thereto, osteohalisteresis andrachitis are known as bone diseases induced by selective inhibition of mineralization, unlike osteoporosis. A bone is formed by mineralization of a matrix layer comprising collagen or the like via hydroxyapatite deposition. Osteohalisteresis is a pathological condition in which such mineralization is blocked and osteoids increase, and it is referred to as rachitis if developed during childhood. 
     Symptoms include bone and joint pains, such as chiropodalgia, arthralgia, lumbago, and backache, which lead to gait impairment and to a state in which bone is easily fractured. In the case of children, developmental disorders, limb deformities such as bow-legs, pigeon breast deformity, or other symptoms are observed. Such symptoms are generally treated with the use of vitamin D, calcium preparations, and phosphorus preparations, in addition to alimentary therapy. If the level of dysfunction caused by a deformity is high, however, surgical operation is the only possible symptomatic treatment. Therefore, development of agents that are more effective on osteohalisteresis or rachitis has been awaited. 
     As described above, bone is tissue that is always regulated by the balance between osteoblast functions and osteoclast functions and remodeled. In order to achieve tough bone that is more resistant to fracture, accordingly, a mere increase in bone mass may not be sufficient. 
     In the case of hereditary diseases, such as osteopetrosis (Non-Patent Literature 21), Paget disease of bone (Non-Patent Literature 22) or Camurati-Engelmann&#39;s disease (CED) (Non-Patent Literatures 23 and 24), for example, it is known that the balance between bone formation and bone resorption becomes abnormal due to different causes, and bone strength is lowered even though bone mass is increased. 
     Examples of factors that determine bone strength from the viewpoint of mechanisms of materials include form-related factors, such as connectivity of cancellous bones, thickness of cortical bones, porosity, and cross-sectional moment, and qualitative factors, such as mineralization or bone fatigue, in addition to quantitative factors represented by bone density (Non-Patent Literature 25). Therefore, development of agents useful for improving bone strength, in addition to increasing bone mass, has been awaited for the purpose of treatment of primary osteoporosis and secondary osteoporosis. 
     In recent years, factors associated with the Wnt/LRP signal control mechanism have drawn attention as targets for drug discovery regarding a bone formation accelerator. Wnt is a secreted glycoprotein that has been lipid-modified by palmitic acid having a molecular weight of about 40,000, and 19 types thereof are considered to be present in mammalian animals. As Wnt receptors, 10 types of seven-transmembrane receptors (i.e., Frizzled receptors) and two types of single transmembrane receptors (i.e., LRP5/6 receptors) have been reported (Non-Patent Literature 26). 
     A region referred to as a cysteine-rich domain (CRD) containing conserved 10 cysteine residues is present in an extracellular region of the Frizzled receptor family molecule to which Wnt is considered to bind. The region from the cysteine residue located closest to the N-terminus to the cysteine residue located closest to the C-terminus of such 10 cysteine residues may be exclusively designated as a CRD (Non-Patent Literature 27), or a region comprising such 10 cysteine residues and sequences each located closer to the C- or N-terminus may be designated as a CRD (R&amp;D systems). CRDs were reported to have homodimer structures based on crystal structural analysis using a CRD of mouse Frizzled 8 (Non-Patent Literature 28). 
     At least three types of Wnt signaling pathways are considered to exist: a canonical-Wnt signaling pathway; a non-canonical Wnt signaling pathway, which is a PCP (planar cell polarity) pathway mediated by a small G-binding protein; and a Ca2+ pathway mediated by a trimeric G protein. Bone-metabolism-related research on the canonlcal-Wnt signaling pathway is the most advanced, and Wnt is considered to promote bone formation (Non-Patent Literature 29). Therefore, regulation of functions of endogenous factors that inhibit this signaling pathway has been attempted in recent years for the purpose of application thereof to treatment of bone diseases. 
     Sclerostin was recognized as a BMP antagonist at first; however, it was reported to be a factor that would directly bind to LRP5/6 to inhibit the signaling pathway in research conducted later (Non-Patent Literature 30). A significant increase was observed in bone density in a Sclerostin-knockout mouse (Non-Patent Literature 31). At present, a Sclerostin-neutralizing antibody is undergoing phase II trials in Europe and the United States of America (AMG785, Amgen &amp; UCB), and the future development thereof has drawn attention. 
     A DKK1 (Dickkopf-1)-neutralizing antibody that is known as another canonlcal-Wnt signal inhibitor was prepared, inhibition of lowered bone density was observed in an SCID mouse into which multiple myeloma (MM) cells had been transplanted (Non-Patent Literature 32), and clinical trials using a neutralizing antibody (BHQ880, Novartis) have been conducted. 
     sFRP (soluble frizzled-related protein) that is considered to be a Wnt decoy receptor and has high amino acid sequence homology to the Frizzled extracellular domain is considered to negatively regulate Wnt signals (Non-Patent Literature 33), and an increase in the amount of cancellous bone in the femur of an sFRP1 knockout mouse has been reported (Non-Patent Literature 34). Under such circumstances, research and development related to sFRP1 inhibitors have proceeded (Wyeth). 
     Frizzled 7 has been identified as a receptor that binds to a Wnt ligand and transmits signals thereof (Non-Patent Literatures 35 and 36). The amino acid sequence of the human Frizzled 7 extracellular cysteinerich domain (when a region from the cysteine residue located closest to the N-terminus to the cysteine residue located closest to the C-terminus of such 10 conserved cysteine residues is exclusively designated as a CRD) is completely identical to that of the mouse Frizzled 7 extracellular cysteine-rich domain (i.e., there is no difference between species). Involvement thereof with generation and differentiation of individual organisms (Non-Patent Literature 37) and involvement thereof with liver cell multiplication (Non-Patent Literature 38) have been reported. 
     Expression patterns of such molecules have been reported: an expression pattern localized in the crypt base of the mouse small intestine or large intestine (Non-Patent Literature 39); elevated expression levels in various cancer cells (Non-Patent Literature 40); expression in various tissues (the brain, eyeball, heart, kidney, liver, lung, or spermary) other than those of the spleen via expression analysis of adult mouse-derived tissues of (Non-Patent Literature 35); and expression in tissue (the lung or kidney) other than those of the brain and the liver via expression analysis of human fetal tissue and potent expression in the skeletal muscle and relatively potent expression in the heart, weak expression in the brain, the placenta, and the kidney; and no expression in the lung, the liver, the pancreas, the spleen, the thymic gland, the prostate, the testicle, the ovary, the small intestine, or the large intestine via expression analysis of adult human-derived tissue (Non-Patent Literature 41). 
     An extracellular cysteine-rich domain that is a soluble receptor of the Frizzled receptor is considered to bind to Wnt and inhibit functions thereof. It is reported by an in vitro experimentation system that a fusion product of the Frizzled 7 extracellular cysteine-rich domain (comprising a region from the cysteine residue located closest to the N-terminus to the cysteine residue located closest to the C-terminus of the conserved 10 cysteine residues and sequences each located closer to the C- or N-terminus) and Fc (R &amp; D Systems) inhibits stabilization of cytoplasmic β-catenin by Wnt3a (Non-Patent Literature 42). 
     Since the expression level of Frizzled 7 is elevated in cancer cells, it has drawn attention as a target molecule for tumor treatment (Patent Literature 2, Non-Patent Literature 43). Regarding colon cancer cells into which a vector that expresses a Frizzled 7 extracellular domain has been introduced, for example, growth thereof was inhibited to a greater extent in a xenograft tumor cell transplantation model compared with colon cancer cells into which a control vector had been introduced (Non-Patent Literature 44). This suggests the possibility that Frizzled 7 would be a target of drug discovery for tumor treatment. 
     As described above, 10 types of Frizzled family molecules have been reported, and Frizzled 1 and Frizzled 2 have been reported as molecules having particularly high primary sequence homology with Frizzled 7 in the extracellular cysteine-rich domain (when a region from the cysteine residue located closest to the N-terminus to the cysteine residue located closest to the C-terminus of the conserved 10 cysteine residues is exclusively designated as a CRD; Non-Patent Literature 22). 
     The amino acid homologies of Frizzled 7 in the cysteine rich domain (when a region from the cysteine residue located closest to the N-terminus to the cysteine residue located closest to the C-terminus of the conserved 10 cysteine residues is exclusively designated as a CRD) of such molecule to Frizzled 1 and Frizzled 2 are 91% and 93% respectively in humans and mice. That is, such amino acid sequence homology is very high. 
     As with the case of Frizzled 7, Frizzled 1 and Frizzled 2 do not show differences between mouse-derived and human-derived amino acid sequences in the cysteine rich domain (when a region from the cysteine residue located closest to the N-terminus to the cysteine residue located closest to the C-terminus of the conserved 10 cysteine residues is exclusively designated as a CRD); i.e., such sequences are 100% consistent with each other. 
     As with Frizzled 7, it is reported that both Frizzled 1 and Frizzled 2 interact with Wnt and Frizzled 1 interacts with Wnt3a to protect the hippocampal neuron from being destroyed by amyloid β peptide (Non-Patent Literature 45). 
     In addition, regarding Frizzled 1 expression patterns, potent expression in the heart, the placenta, the lung, the kidney, the pancreas, the prostate, and the ovary observed via expression analysis of adult human derived tissue and potent expression in the lung and the kidney observed via expression analysis of fetus-derived tissue have been reported (Non-Patent Literature 41). 
     Since the expression levels of both Frizzled 1 and Frizzled 2 are elevated in the case of colon cancer or breast cancer, the correlation thereof with canceration is suggested, and they have drawn attention as target molecules for tumor treatment (Patent Literature 1, Non-Patent Literatures 46 and 47). Further, it was reported that Frizzled 1 would not cause any changes in the phenotype of the Frizzled 1 gene-disrupted mouse (Non-Patent Literature 48). 
     In super-aging society, bone diseases involved in osteoporosis, arthritis deformans, rheumatoid arthritis and malignant tumors and treatment of these bone diseases is increasingly considered as socially important issue, and medicaments for treating bone diseases are vigorously researched and developed. 
     Kakitani and co-workers have found that a protein containing an extracellular cysteine-rich domain derived from Frizzled 1, Frizzled 2 or Frizzled 7 specifically promotes an increase in bone mass and bone strength (Patent Literature 3). However, there still remains a need for more improvement of secretion activity in production cells (productivity) and bone mass-increasing activity. 
     CITATION LIST 
     Patent Literature 
     
         
         [Patent Literature 1] WO 2008/061013 
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     DISCLOSURE OF INVENTION 
     Problems to be Solved by the Invention 
     The present invention has been developed to solve above-mentioned problems. A major objective of the present invention is to provide a protein comprising a truncated form of an extracellular region protein derived from Frizzled 2 which has a high degree of secretion activity in production cells, and/or excellent bone mass-increasing activity, and a pharmaceutical composition containing the protein. 
     Means for Solving the Problems 
     Surprisingly, the inventors have found that secretion activity in production cells is dramatically increased using a protein comprising an extracellular region protein of Frizzled 2, in particular a truncated form of the extracellular region protein comprising minimal region sequence of a cysteine-rich domain represented by SEQ ID NO:102 and having 141 to 175 amino acids in length (hereinafter, it is also referred to as a protein comprising a truncated form of an extracellular region protein of Frizzled 2). 
     More particularly, the inventors have found that secretion activity in production cells of a fusion protein is dramatically increased wherein the protein comprising a truncated form of an extracellular region protein of Frizzled 2 is a fusion protein of the truncated form of the extracellular region protein and a human Fc protein. 
     Further, the inventors have found for the first time that the protein comprising a truncated form of an extracellular region protein of Frizzled 2 has bone mass-increasing activity greater than or at least equal to proteins comprising an extracellular cysteine-rich domain of Frizzled 2 as disclosed in Patent Literature 3. 
     Based on these findings, it is demonstrated that a protein comprising a truncated form of an extracellular region protein of Frizzled 2, and a pharmaceutical composition for treating bone diseases comprising the protein can be efficiently obtained. 
     That is, the present invention is as follows.
     1. A protein comprising the minimal region sequence of cysteine-rich domain (CRD) represented by SEQ ID NO:102 and having 141 to 175 amino acids in length.   2. The protein according to item 1 above, wherein 14 to 48 amino acids are added to the C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102.   3. The protein according to item 2 above, wherein 26 to 48 amino acids are added to the C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102.   4. The protein according to item 3 above, wherein 32, 38, 44, or 48 amino acids are added to C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102.   5. The protein according to any one of items 1 to 4 above, wherein amino acids comprising at least the amino acids from V at position 128 to L at position 141 in the amino acid sequence represented by SEQ ID NO:1 are added to the C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102.   6. The protein according to item 5 above, wherein amino acids having any length selected from the amino acids from T at position 142 to P at position 175 in the amino acid sequence represented by SEQ ID NO:1 are additionally added after L at position 141 of the amino acid sequence represented by SEQ ID NO:1.   7. The protein according to any one of items 1 to 6 above, wherein 1 to 15 amino acids are added to the N-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102.   8. The protein according to item 7 above, wherein the amino acids added to the N-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102 are amino acids having any length selected from the amino acids from Q at position 1 to F at position 15 in the amino acid sequence represented by SEQ ID NO:1.   9. A protein comprising amino acids from the amino acid Q at position 1 of the N-terminal to any one amino acid of A at position 153, G at position 154, G at position 155, T at position 156, P at position 157, G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 166, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, H at position 174, or P at position 175 of the amino acid sequence represented by SEQ ID NO:1.   10. The protein according to any one of items 1 to 9 above, wherein the protein is chemically modified.   11. The protein according to item 10 above, wherein the protein is chemically modified by binding to one or more polyethylene glycol molecules.   12. The protein according to item 10 above, wherein the protein is chemically modified by binding to a sugar chain.   13. The protein according to any one of items 1 to 12 above, wherein the protein is a recombinant protein.   14. A fusion protein of the protein according to any one of items 1 to 13 above and a mammal-derived immunoglobulin Fc protein or a variant of the mammal-derived immunoglobulin Fc protein.   15. The fusion protein according to item 14 above, wherein the mammal-derived immunoglobulin Fc protein consists of the amino acid sequence represented by SEQ ID NO:3.   16. The fusion protein comprising the amino acid sequence represented by any one of SEQ ID NOs:72 to 94.   17. A pharmaceutical composition for treating bone diseases comprising the fusion protein according to any one of items 14 to 16 above.   18. DNA encoding the protein according to any one of items 1 to 13 above or the fusion protein according to any one of items 14 to 16.   19. The DNA according to item 18, wherein nucleotide sequence encoding the mammal-derived immunoglobulin Fc protein is the nucleotide sequence represented by SEQ ID NO:4.   20. DNA consisting the nucleotide sequence represented by any one of SEQ ID NOs:42 to 64.   21. A pharmaceutical composition for treating bone diseases comprising the DNA according to any one of items 18 to 20 above.   22. The pharmaceutical composition for treating bone diseases according to item 17 or 21 above, wherein the bone diseases are diseases involving decrease in at least one selected from bone mass, bone density and bone strength.   23. A method for treating bone diseases comprising administrating to a mammal the pharmaceutical composition for treating bone diseases according to item 17, 21 or 22 above.   24. The method according to item 23 above, wherein the mammal is a human being.   25. The method according to item 23 or 24 above, wherein the bone diseases are diseases involving decrease in at least one selected from bone mass, bone density and bone strength.   26. The method according to any one of items 23 to 25 above, wherein the pharmaceutical composition for treating bone diseases is simultaneously or sequentially administrated in combination with other therapeutic drugs for treating bone diseases.   

     Effect of Invention 
     A protein comprising a truncated form of an extracellular region protein of Frizzled 2 of the present invention has a high degree of secretion activity in production cells. Also, the protein comprising a truncated form of an extracellular region protein of Frizzled 2 of the present invention has bone mass-increasing activity greater than or equal to proteins comprising an extracellular cysteine-rich domain of Frizzled 2 as disclosed in Patent Literature 3. 
     Thus, according to the present invention, a protein comprising a truncated form of an extracellular region protein derived from Frizzled 2 which has improved secretion activity in production cells and/or bone mass-increasing activity can be efficiently obtained. Furthermore, by using said protein, diseases involving a reduction in bone mass, bone density and/or bone strength, for example osteoporosis, arthritis deformans, rheumatoid arthritis, bone diseases resulting from malignant tumors, and various related bone diseases and disorders can be treated without causing side effects. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows the recombinant expression vector hFZD2(140)-hFcm. * represents unique sites of restriction enzymes. 
         FIG. 2  shows the recombinant expression vector hFZD2(X)-hFcm. X is any one of 153-175, 178, 184, 190, 197, 210, 216 and 222. * represents unique sites of restriction enzymes. 
         FIG. 3  shows concentrations of hFZD2(140)-hFcm, hFZD2(153)-hFcm to hFZD2(175)-hFcm, hFZD2(178)-hFcm, hFZD2(184)-hFcm, hFZD2(190)-hFcm, hFZD2(197)-hFcm, hFZD2(210)-hFcm, and hFZD2(216)-hFcm in culture supernatants. The vertical axis represents a concentration in culture supernatants (ng/mL). The horizontal axis represents hFZD2(X)-hFcm types by X values. 
     
    
    
     EMBODIMENTS FOR CARRYING OUT THE INVENTION 
     Hereinafter, the present invention will be described in detail. 
     20 amino acids in amino acid sequences shown in the disclosure excluding the sequence lists may be abbreviated as one-letter codes. That is, glycine (Gly) is G, alanine (Ala) is A, valine (Val) is V, leucine (Leu) is L, isoleucine (Ile) is I, phenylalanine (Phe) is F, tyrosine (Tyr) is Y, tryptophane (Trp) is W, serine (Ser) is S, treonine (Thr) is T, cysteine (Cys) is C, methionine (Met) is M, aspartic acid (Asp) is D, glutamic acid (Glu) is E, asparagine (Asn) is N, glutamine (Gln) is Q, lysine (Lys) is K, arginine (Arg) is R, histidine (His) is H, and proline (Pro) is P. 
     The present invention provides a protein comprising a truncated form of an extracellular region protein derived from a Frizzled 2 receptor from mammals, as mentioned above, and a pharmaceutical composition for treatment of bone diseases containing a vector comprising DNA encoding said protein as an active ingredient. 
     &lt;Extracellular Region Protein of Frizzled Receptor&gt; 
     A Frizzled receptor of the present invention is mammalian animal-derived Frizzled 2. Frizzled receptors have an extracellular region protein, and the extracellular region protein has an extracellular cysteine-rich domain. The Frizzled receptors have particularly high identity of extracellular cysteine-rich domains (hereinafter, it is also referred to as “CRD”) among ten types of Frizzled receptors whose ligands are Wnt. 
     In human and mouse, as measured by an amino acid identity from N-terminal first cysteine residue to C-terminal tenth cysteine residue of CRDs of Frizzled receptors, CRD of Frizzled 7 and CRD of Frizzled 2 exhibit 93% identity. Amino acid sequences in the region have the same sequences between human and mouse, and are highly conserved between the species. 
     Information on amino acid and nucleotide sequences of Frizzled 2 is available from NCBI (USA). 
     Frizzled 2 (also referred to as “FZD2”) is isolated from, for example, human, mouse, rat, or  Xenopus , and sequence information is open to the public. In the present invention, the origin of the Frizzled 2 protein or a nucleic acid encoding the same is not limited, and it is preferably derived from, for example, a mammalian animal, such as a primate including a human and a rodent including mouse. 
     Sequence information of human- or mouse-derived Frizzled 2 is registered under, for example, Accession Number: NM 001466. 1, NM 001466.2, or NP 001457.1 in the case of human Frizzled 2, or Accession Number: NM 020510.1, NM 020510.2, NP 065256.1 in the case of mouse FZD2, with the GenBank. 
     Amino acid sequence of extracellular region protein of human Frizzled 2 is as follows: 
     Amino acid sequence of extracellular region protein of human Frizzled 2 (SEQ ID NO:1): 
     
       
         
           
               
            
               
                 QFHGEKGISIPDHGF CQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEV   
               
               
                   
               
               
                 
                   HQFYPLVKVQCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGC 
                 
               
               
                   
               
               
                   EALMNKFGFQWPERLRCEHFPRHGAEQIC VGQNHSEDGAPALLTTAP 
               
               
                   
               
               
                 PPGLQPGAGGTPGGPGGGGAPPRYATLEHPFHCPRVLKVPSYLSYKFL 
               
               
                   
               
               
                 GERDCAAPCEPARPDGSMFFSQEETRFAR 
               
            
           
         
       
     
     The moiety from the 16 th  amino acid C from N-terminal to the 127 th  amino acid C from N-terminal corresponds to the sequence from the first cysteine residue on N-terminal side to the tenth cysteine residue on C-terminal side, which represents minimal region sequence of an extracellular cysteine-rich domain (hereinafter, it is also referred to as CRD) (SEQ ID NO:102). Also, at least minimal region sequence of CRD is the same sequence between human and mouse. 
     
       
         
           
               
            
               
                 SEQ ID NO: 102: 
               
               
                 CQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKVQCSPEL 
               
               
                   
               
               
                 RFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERL 
               
               
                   
               
               
                 RCEHFPRHGAEQIC 
               
            
           
         
       
     
     In the present invention, “an extracellular cysteine-rich domain (CRD)” is a protein which comprises at least amino acid sequences from the first cysteine residue on N-terminal to the tenth cysteine residue in an extracellular region protein of a Frizzled receptor selected from the group consisting of Frizzled 2s derived from mammals and has ability to increase bone mass in mammals. 
     In this context, “comprise at least” as used herein means that the extracellular cysteine-rich domain may be composed of a minimal region sequence of the cysteine-rich domain (minimal CRD sequence) spanning from the first cysteine residue on N-terminal side to the tenth cysteine residue in an extracellular region protein of a Frizzled receptor, or alternatively may have any foreign sequence added to N-terminal and/or C-terminal of the minimal CRD sequence as long as the sequence has an ability to increase bone mass. 
     Also, for Frizzled 2, the minimal region sequence of the cysteine-rich domain (minimal CRD sequence) may include amino acid sequence represented by SEQ ID NO:102. In this context, “foreign sequence” may include, for example, a sequence derived from any foreign protein unrelated to the extracellular region protein of the Frizzled receptor, an artificial sequence, or a sequence derived from a portion of the extracellular region protein of a foreign Frizzled receptor other than the minimal CRD sequence. 
     Alternatively, the extracellular cysteine-rich domain according to the present invention is a protein which comprises an amino acid sequence comprising at least the amino acid sequence spanning from the first cysteine residue on the N-terminal side to the tenth cystein residue in the extracellular region protein of the Frizzled receptor selected from the group consisting of mammalian animal-derived Frizzled 2 and has ability to increase bone mass, bone density and/or bone strength in mammals. 
     In this context, “comprises at least” as used herein means that the minimal sequence consists of the amino acid sequence spanning the first cystein residue on the N-terminal side to the tenth cysteine residue in the extracellular region protein of the Frizzled receptor, and a sequence derived from the extracellular region protein of the Frizzled receptor of the same species may be adequately extended and comprised at the N-terminus and/or C-terminus of the minimal sequence. 
     Thus, the extracellular cysteine-rich domain can comprise any amino acid sequence spanning from the aforementioned minimal CRD sequence to the maximal CRD sequence of the extracellular region protein of Frizzled receptor. 
     &lt;Truncated Form of Extracellular Region Protein of Frizzled Receptor&gt; 
     In the present invention, “a truncated form of an extracellular region protein of a Frizzled receptor” means a protein comprising at least the first cystein residue on the N-terminal side to the tenth cysteine residue in the extracellular region protein (minimal region sequence of cysteine-rich domain) of an extracellular region protein of Frizzled 2 derived from mammals and having a portion of amino acids of an extracellular region protein of the Frizzled receptor. 
     In the present invention, a truncated form of an extracellular region protein of Frizzled 2 means a protein comprising the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102 and having 141 to 175 amino acids in length. The total length of a truncated form of an extracellular region protein of Frizzled 2 has 141 to 175 amino acids, preferably 153 to 175 amino acids. 
     More preferably, a truncated form of an extracellular region protein of Frizzled 2 is a protein wherein preferably 14 to 48 amino acids, more preferably 26 to 48 amino acids are added to C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102. 
     More preferably, a truncated form of an extracellular region protein of Frizzled 2 is any one of said proteins wherein 32, 38, 44 or 48 amino acids are added to C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102. 
     Furthermore preferably, a truncated form of an extracellular region protein of Frizzled 2 is any one of said proteins wherein amino acids comprising at least the amino acids from V at position 128 to L at position 141 in the amino acid sequence represented by SEQ ID NO:1 are added to C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102. 
     Furthermore preferably, a truncated form of an extracellular region protein of Frizzled 2 is any one of said proteins wherein amino acids of any length selected from the amino acids from T at position 142 to P at position 175 in the amino acid sequence represented by SEQ ID NO:1 are additionally added to C-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102 after L at position 141 in the amino acid sequence represented by SEQ ID NO:1 
     In this context, “amino acids of any length selected from the amino acids from T at position 142 to P at position 175 in the amino acid sequence represented by SEQ ID NO:1 are added”, for example specifically means that any contiguous amino acids selected from the amino acids from T at position 142 to P at position 175 in the amino acid sequence represented by SEQ ID NO:1 are added. 
     Furthermore preferably, a truncated form of an extracellular region protein of Frizzled 2 is any one of said proteins wherein 1 to 15 amino acids are additionally added to N-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102. 
     Furthermore preferably, a truncated form of an extracellular region protein of Frizzled 2 is any one of said proteins wherein amino acids of any length selected from the amino acids from Q at position 1 to F at position 15 in the amino acid sequence represented by SEQ ID NO:1 are additionally added to N-terminal of the minimal region sequence of cysteine-rich domain represented by SEQ ID NO:102. 
     In this context, “amino acids of any length selected from the amino acids from Q at position 1 to F at position 15 in the amino acid sequence represented by SEQ ID NO:1 are added”, for example specifically means that any contiguous amino acids selected from the amino acids from Q at position 1 to F at position 15 in the amino acid sequence represented by SEQ ID NO:1 are added. 
     Furthermore preferably, a truncated form of an extracellular region protein of Frizzled 2 is a protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of A at position 153, G at position 154, G at position 155, T at position 156, P at position 157, G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 166, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, H at position 174, or P at position 175 of the amino acid sequence represented by SEQ ID NO:1. 
     Furthermore preferably, a truncated form of an extracellular region protein of Frizzled 2 is a protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, or H at position 174 of the amino acid sequence represented by SEQ ID NO:1. 
     More preferably, a truncated form of an extracellular region protein of Frizzled 2 is a protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, or L at position 172 of the amino acid sequence represented by SEQ ID NO:1. 
     Most preferably, a truncated form of an extracellular region protein of Frizzled 2 is a protein comprising amino acids from the amino acid Q at position 1 of N-terminal to the amino acid R at position 168 of the amino acid sequence represented by SEQ ID NO:1. 
     Surprisingly, the foregoing proteins comprising truncated forms of an extracellular region protein of Frizzled 2 have improved secretion activity in production cells or equivalent activity compared to known proteins comprising an extracellular cysteine-rich domain of Frizzled 2 (for example, those disclosed in WO 2010/038756 (Patent Literature 3)), as well as bone mass-increasing activity greater than or at least equal to these known proteins. 
     Particularly, when using the protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of A at position 153, G at position 154, G at position 155, T at position 156, P at position 157, G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 166, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, H at position 174, or P at position 175 of the amino acid sequence represented by SEQ ID NO:1 as a truncated form of an extracellular region protein of Frizzled 2, it was demonstrated that the protein comprising any one of these truncated forms has dramatically improved secretion activity in production cells compared to known proteins comprising an extracellular cysteine-rich domain of Frizzled 2 (for example, those disclosed in WO 2010/038756 (Patent Literature 3)), and/or bone mass-increasing activity greater than or equal to these known proteins. 
     Further, when using the protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, or H at position 174 of the amino acid sequence represented by SEQ ID NO:1 as a truncated form of an extracellular region protein of Frizzled 2, it is desirable for dramatically improved secretion activity in production cells and/or bone mass-increasing activity. 
     Further, when using the protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, P at position 167, Rat position 168, Y at position 169, A at position 170, T at position 171, or L at position 172 of the amino acid sequence represented by SEQ ID NO:1 as a truncated form of an extracellular region protein of Frizzled 2, it was demonstrated that the protein comprising any one of these truncated forms has dramatically improved secretion activity in production cells compared to known proteins comprising an extracellular cysteine-rich domain of Frizzled 2 (for example, those disclosed in WO 2010/038756 (Patent Literature 3)), and/or bone mass-increasing activity greater than or equal to these known proteins. 
     It is most preferred to use the protein comprising amino acids from the amino acid Q at position 1 of N-terminal to the amino acid R at position 168 of the amino acid sequence represented by SEQ ID NO:1 as a truncated form of an extracellular region protein of Frizzled 2. 
     In the present invention, “production cells” may include, but not limited to, bacteria such as genus  Escherichia  such as  Escherichia coli , genus  Bacillus  such as  Bacillus subtilis  or genus  Pseudomonas  such as  Pseudomonas putida ; yeasts such as genus  Saccharomyces  such as  Saccharomyces cerevisiae  or  Schizosaccharomyces pombe , genus  Candida  or genus  Pichia ; animal cells such as CHO, COS, HEK293, NIH3T3 or NS0; insect cells such as 519 or Sf21; or plant cells. Any cells may be used as long as it can secret or produce proteins of the present invention. 
     In the present invention, “improved secretion activity” means at least having an higher amount of expression in production cells compared to known proteins comprising an extracellular cysteine-rich domain of Frizzled 2 disclosed in WO 2010/038756 (Patent Literature 3) 
     In the present invention, “an increase in bone mass” means at least an increase in bone volume/tissue volume. The bone volume/tissue volume refers to the total volume of trabeculars in total tissue volume. An increase in bone volume/tissue volume refers to an increase in bone density. 
     Also, “an increase in bone mass” may involve an increase in trabecular thickness, an increase in the trabecular number, and/or a decrease in trabecular separation in addition to an increase in bone volume/tissue volume. Herein, the trabecular thickness refers to an average of trabecular thickness, the trabecular number is the trabecular number per unit length, and the trabecular separation is a distance between adjacent trabeculars. 
     In the present invention, mammals includes primates, livestock animals, rodents, ungulates, pet animals or the like, but not limited thereto. Preferred mammals are human and mouse. Mouse is important in that it has the same sequence as those derived from human in amino acid sequence of its extracellular cysteine-rich domain (CRD), in particular minimal CRD sequence from the first cystein residue on the N-terminal side to the tenth cysteine residue. More preferred mammal is human. 
     &lt;Mutant of Truncated Form of Extracellular Region Protein&gt; 
     Mutants of truncated forms of the extracellular region protein of the present invention may include any of natural mutants and artificial mutants, and refer to proteins comprising one or more (preferably one or several) amino acid substitution(s), deletion(s) or addition(s) in the amino acid sequence of the extracellular region protein, or otherwise comprising amino acid sequence which has 80% or more, preferably 85% or more, more preferably 90% or more, for example 93% or more, 95% or more, 97% or more, 98% or more or 99% or more identity to the amino acid sequence of the extracellular region protein, and having ability to improve secretion activity in production cells and increase bone mass. 
     For example, the mutants comprises one or more (preferably one or several) amino acid substitution(s), deletion(s) or addition(s) in amino acid sequence represented by SEQ ID NO:102 or SEQ ID NO:1, or otherwise comprising amino acid sequence which has 80% or more, preferably 85% or more, more preferably 90% or more, for example 93% or more, 95% or more, 97% or more, 98% or more or 99% or more identity to the subject amino acid sequence, and have ability to improve secretion activity in production cells and increase bone mass. 
     As used herein, the term “several” represents usually an arbitrary integer from 2 to 10. Preferably, the term “several” represents an arbitrary integer between 2 to 5. 
     As used herein, the term “identity” means the degree of matching between sequences in the alignment of two amino acid sequences (or nucleotide sequences) when aligning said two sequences such that the number of identical amino acid residues (or the number of nucleotides) becomes maximum. Specifically, it is represented as the percentage (%) of the number of identical amino acid residues (or the number of identical nucleotides) to the total number of amino acid residues (or the total number of nucleotides). When gaps are introduced as in FASTA, the number of gaps is added to the total number of amino acid residues (or the total number of nucleotides). 
     Proteins having 80% or more, preferably 85% or more sequence identity may be searched using a sequence identity search program such as BLAST or FASTA in sequence database available from NCBI (USA) or EMBL (Europe) (Altschul, S. F. et al., (1990) J. Mol. Biol. 15:403-410; Karlin, S, and Altschul S. F. (1990) Proc. Natl. Acad. Sci. USA 87:2264-2268; and the like). 
     In BLAST, sequences are divided into words having a fixed length, similar segments are searched in the words, local alignment is performed by extending these segments in both directions until largest similarity is obtained, and finally these segments are combined to perform final alignment. 
     In FASTA, identical contiguous segments in sequences are rapidly searched, local alignment is performed based on high similarity in these segments, and finally these segments are combined to perform final alignment taking account of gaps. 
     When a mutation is introduced into the extracellular cysteine-rich domain of the present invention, it is preferable that amino acid residues other than 10 cysteine residues in the sequence spanning the first cystein residue on the N-terminal side to the tenth cysteine residue on the C-terminal side of the extracellular region protein of the Frizzled receptor (minimal CRD sequence) be exclusively subjected to a mutation of substitution, deletion, or addition, natural disulfide bonds be not destructed, and a natural confoimation be substantially maintained. 
     If a natural disulfide bond(s) in the extracellular cysteine-rich domain is destructed and an inherent conformation is altered, the protein domain may disadvantageously lose or significantly reduce the bone mass, bone density and/or bone strength or greatly reduce the ability. 
     To introduce mutagenesis, when sequence of the extracellular cysteine-rich domain is known, site-directed mutagenesis using PCR with primers synthesized based on the sequence (including complementary mutant sequence) is preferably used (Kunkel et al., Proc. Natl. Acad. Sci. USA, 1985, 82:488-492; F. M. Ausubel et al., Short Protocols in Molecular 
     Biology, 1995, John Wiley &amp; Sons; J. Sambrook et al., Molecular Cloning: A Laboratory Manual, 2nd ed., 1989, Cold Spring Harbor Laboratory Press; and the like). Commercially available mutagenesis introduction kits (such as those made by Takara Shuzo Co., Ltd.) may also be used according to manufacturer&#39;s instruction. 
     Briefly, the method of Kunkel comprises using a plasmid containing DNA encoding the extracellular cysteinerich domain as a template, annealing a primer having a phosphorylated 5′ terminus with T4 DNA polynucleotide kinase (including a complementary mutant sequence) to the template, synthesizing DNA, ligating the terminuses with the aid of T4 DNA ligase, and purifying DNA containing mutation of interest. 
     In the present invention, the mutation includes a substitution, a deletion, an addition, an insertion, or combinations thereof. Substitution may be conservative or non-conservative. Conservative substitution is preferable in order to substantially refrain from altering the conformation of a protein of the extracellular cysteine-rich domain. refers to substitution across amino acids having similar structural properties (e.g., a branch state or aromaticity), electric properties (e.g., acidic or basic properties), and chemical and physical properties (e.g., polar or hydrophobic properties). 
     Branched amino acids include valine, leucine and isoleucine. Aromatic amino acids include tyrosine, tryptophane, phenylalanine and histidine. Acidic amino acids include glutamic acid and aspartic acid. 
     Basic amino acids include lysine, arginine and histidine. Polar amino acids include serine, treonine, glutamine, asparagine, tyrosine, cysteine, glycine, proline and the like. Hydrophobic amino acids include alanine, valine, leucine, isoleucine, methionine and the like. 
     Deletion involves loss of one or a plurality of amino acid residues. Addition involves binding of one or a plurality of amino acid residues to the protein N- or C-terminus. Insertion involves binding of one or a plurality of amino acid residues to the inside of a protein. 
     Among these, deletion and insertion can be performed, provided that a protein conformation of the extracellular cysteine-rich domain is not substantially changed. Thus, the number of amino acid residues that can be subjected to deletion or insertion is preferably limited to about 1 to 5. 
     &lt;Protein Comprising Truncated Form of Extracellular Region Protein or Mutant Thereof&gt; 
     As discussed above, one of active ingredients used in a pharmaceutical composition of the present invention is a protein comprising a truncated form of an extracellular region protein of mammal-derived Frizzled 2 which has improved secretion activity in production cells and bone mass-increasing activity, or a mutant thereof having 85% or more sequence identity to the truncated form which has also improved secretion activity in production cells and bone mass-increasing activity. 
     In the present invention, “a truncated form of an extracellular region protein of mammal-derived Frizzled 2” means all of truncated forms of extracellular region protein listed above. 
     In the present invention, the expression “comprising” means that foreign peptides, polypeptides or proteins may be bound or fused to N-terminal or C-terminal of the above truncated from of an extracellular domain or mutant thereof, via an appropriate peptide linker (for example, 1 to 20 amino acids), if necessary. Preferred examples of such foreign proteins may include mammal-derived immunoglobulin Fc proteins or variants thereof. 
     However, if such foreign proteins are administrated in vivo, a rejection reaction may occur. Therefore, to avoid such a rejection reaction as much as possible, it is preferred to use proteins inherent to mammals subjected to administration as a foreign protein. 
     When considering application to human, a preferred Fc protein is a human immunoglobulin Fc proteins. Also, as classes or subclasses of immunoglobulin, but not limited to, for example any of IgG, IgD, IgE, IgM, IgA, IgG1, IgG2, IgG2a, IgG2b, IgG2c, IgG3, IgG4, IgA1 or IgA2 may be used, but when applying to human, it is preferred to use a class or subclass of a human immunoglobulin. 
     Fc proteins can improve stability of an extracellular cysteine-rich domain or a mutant thereof in vivo. In such a case, however, biological activity, such as antibody dependent cellular cytotoxicity (ADCC) and/or complement dependent cytotoxicity (CDC), of the Fc protein is preferably lowered in advance in order to avoid the influence of such biological activity in vivo. To this end, it is preferred to introduce variations to suppress, reduce or eliminate the above-mentioned bioactivities. 
     As such variation, there may be any amino acid substitutions to reduce ADCC and/or CDC activity, by substituting for example 1 to 10, preferably 1 to 5, and more preferably 1 to 3 amino acid residues in amino acid sequence of a mammal-derived Fc protein. Specifically, substitutions exemplified in Example 1 below may be included. 
     A preferred Fc protein is a human IgG1 Fc variant comprising the amino acid sequence represented by SEQ ID NO:3. The Fc proteins may be bound to either one of N-terminal or C-terminal of an extracellular cysteine-rich domain or a mutant thereof, and it is preferred to be bound at C-terminal. 
     In the present invention, a preferred protein is a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein. 
     In the present invention, a preferred protein is a protein comprising a fusion of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein, wherein a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of A at position 153, G at position 154, G at position 155, T at position 156, P at position 157, G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 166, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, H at position 174, or P at position 175 of the amino acid sequence represented by SEQ ID NO:1 and a human Fc protein. 
     A more preferred protein is a protein comprising a fusion of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein, wherein a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, or H at position 174 of the amino acid sequence represented by SEQ ID NO:1 and a human Fc protein. 
     An even more preferred protein is a protein comprising a fusion of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein, wherein a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, or L at position 172 of the amino acid sequence represented by SEQ ID NO:1 and a human Fc protein. 
     A most preferred protein is a protein comprising a fusion of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein, wherein a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 comprising amino acids from the amino acid Q at position 1 of N-terminal to the amino acid R at position 168 in the amino acid sequence represented by SEQ ID NO:1 and a human Fc protein. 
     More particularly, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising amino acids represented by any one of SEQ ID NOs:72 to 94. 
     More preferably, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising amino acids represented by any one of SEQ ID NOs:77 to 84 and 86 to 93. 
     More preferably, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising amino acids represented by any one of SEQ ID NOs:77, 79 to 83 and 86 to 91. Most preferably, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising the amino acids represented by SEQ ID NO:87. 
     Truncated forms of an extracellular region protein of a fusion protein, which comprise amino acid sequence represented by any one of SEQ ID NOs:72 to 94 are derived from the extracellular region protein of Frizzled 2. The amino acid sequence for each truncated form may comprise variations as described in the above section &lt;Mutant of truncated form of extracellular region protein&gt; as long as the protein has ability to increase bone mass. 
     Surprisingly, the foregoing fusion proteins comprising truncated forms of an extracellular region protein of Frizzled 2 have improved secretion activity in production cells or equivalent activity compared to known fusion proteins comprising an extracellular cysteine-rich domain of Frizzled 2 (for example, those disclosed in WO 2010/038756 (Patent Literature 3)), as well as bone mass-increasing activity greater than or at least equal to these known proteins. 
     For a fusion protein comprising a truncated form of an extracellular region protein of Frizzled 2, particularly, when using the protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of A at position 153, G at position 154, G at position 155, T at position 156, P at position 157, G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 166, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, H at position 174, or P at position 175 of the amino acid sequence represented by SEQ ID NO:1 as the truncated form of an extracellular region protein of Frizzled 2, it was demonstrated that a fusion protein comprising any one of these truncated forms has dramatically improved secretion activity in production cells compared to known fusion proteins comprising an extracellular cysteine-rich domain of Frizzled 2 (for example, those disclosed in WO 2010/038756 (Patent Literature 3)), and/or bone mass-increasing activity greater than or equal to these known proteins. 
     Further, for the fusion protein, when using the protein comprising amino acids from the amino acid Q at position 1 of N-terminal to any one amino acid of G at position 158, G at position 159, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, A at position 165, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, L at position 172, E at position 173, or H at position 174 of the amino acid sequence represented by SEQ ID NO:1, it is desirable for dramatically improved secretion activity in production cells, and/or bone mass-increasing activity. 
     Further, when using the protein comprising amino acids from Q at position 1 of N-terminal to any one amino acid of G at position 158, P at position 160, G at position 161, G at position 162, G at position 163, G at position 164, P at position 167, R at position 168, Y at position 169, A at position 170, T at position 171, or L at position 172 of the amino acid sequence represented by SEQ ID NO:1 in the fusion protein, it was demonstrated that a fusion protein comprising any one of these truncated forms has dramatically improved secretion activity in production cells compared to known fusion proteins comprising an extracellular cysteine-rich domain of Frizzled 2 (for example, those disclosed in WO 2010/038756 (Patent Literature 3)), as well as bone mass-increasing activity greater than or equal to these known proteins. 
     Most preferably, a fusion protein is a fusion of the truncated form of an extracellular region protein of Frizzled 2 comprising amino acids from the amino acid Q at position 1 of N-terminal to the amino acid R at position 168 of the amino acid sequence represented by SEQ ID NO:1 and a human Fc protein. 
     Further, as shown in Examples, it was demonstrated that a fusion protein comprising any one of the amino acid sequences represented by SEQ ID NOs:72 to 94 has surprising effects as described above. 
     Even more preferably, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising any one of the amino acid sequences represented by SEQ ID NOs:77 to 84 and 86 to 93. 
     Even more preferably, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising any one of the amino acid sequences represented by SEQ ID NOs:77, 79 to 83 and 86 to 91. Most preferably, a fusion protein of a truncated form of an extracellular region protein of Frizzled 2 and a human Fc protein is a protein comprising the amino acid sequence represented by SEQ ID NO:87. 
     In the present invention, “production cells” may include, but not limited to, bacteria of the genus  Escherichia  such as  E. coli , the genus  Bacillus  such as  Bacillus subtilis , and the genus  Pseudomonas  such as  Pseudomonas putida ; yeast of the genus  Saccharomyces  such as  Saccharomyces cerevisae  and  Schizosaccharomyces pombe , the genus  Candida , and the genus  Pichia ; animal cells, such as CHO, COS, HEK293, NIH3T3, and NS0; insect cells, such as Sf9 and Sf21; and plant cells. Any cells may be used as long as it can secret or produce proteins of the present invention. 
     In the present invention, “improved secretion activity” means that at least an amount of expression in production cells is higher than those of known fusion proteins comprising an extracellular cysteine-rich domain of Frizzled 2 disclosed in WO 2010/038756 (Patent Literature 3). 
     In the present invention, “an increase in bone mass” involves at least an increase in bone volume/tissue volume. 
     In the present invention, a protein comprising the truncated form of extracellular region protein or a mutant thereof may be not bound or fused to foreign peptides, polypeptides or proteins. That is, the protein of the present invention may be a fragment comprising the aforementioned extracellular region protein, as a fragment of the above-mentioned extracellular region protein of Frizzled 2 receptor. Such a fragment may comprise variations as described in the above Section &lt;Mutant of truncated form of extracellular region protein&gt; as long as it has ability to increase bone mass, bone density and/or bone strength. 
     A protein comprising the truncated form of extracellular region protein or a mutant thereof of the present invention may be produced by gene recombination technique known in the art. In a brief explanation, the protein may be produced by preparing DNA encoding the protein of the present invention, constructing an expression vector containing the DNA, transforming or transfecting prokaryotic or eukaryotic cells with the vector, and recovering a recombined target protein from a culture solution of the cells. 
     The resulting protein may be purified by using common purification methods including ammonium sulfate precipitation, organic solvent precipitation, dialysis, electrophoresis, chromatofocusing, gel filtration chromatography, ion exchange chromatography, affinity chromatography or HPLC, or any combination thereof. 
     The DNA and the vector mentioned above are as described in the above &lt;Nucleic acid and vector&gt; and Examples below. Gene recombination techniques described in, for example, F. M. Ausubel et al., Short Protocols in Molecular Biology, 1995 or John Wiley &amp; Sons, J. Sambrook et al., Molecular Cloning: A Laboratory Manual, 2nd ed., 1989, Cold Spring Harbor Laboratory Press can be applied to the present invention. 
     In the present invention, a protein comprising the truncated form of extracellular region protein or a mutant thereof may be chemically modified. 
     Examples of such chemical modification may include, but not limited to, glycosylation, pegylation (PEGylation), acetylation, amidation, phosphorylation or the like. Glycosylation and pegylation may be particularly preferred. 
     “Pegylation” refers to binding of one or a plurality of polyethylene glycol (PEG) molecules to, for example, an amino acid residue, such as an N-terminal amino group of a protein or a ε-amino group of lysine (Lys). In general, a PEG molecule is bound to a free amino group of an amino acid. 
     An average molecular weight of PEG can be in the range of, but is not limited to, about 3,000 to about 50,000. PEG can be bound to a protein by introducing an active group, such as a carboxyl, formyl(aldehyde), N-hydroxysuccinimide ester, amino, thiol, or maleimide group, to a terminus of PEG and allowing such group to react with a group of a protein, such as an amino, carboxyl, thiol, or hydroxyl group. 
     “Glycosylation (sugar chain binding)” refers to binding of a carbohydrate chain (i.e., a sugar chain) to an asparagine, serine, or threonine residue of a protein. In general, glycosylation takes place upon recognition of an Asn-X-Thr/Ser sequence (wherein X represents an amino acid residue other than Pro). When an amino acid sequence of the protein is modified so as to have such sequence, a sugar chain can be introduced into a site that is different from that of a naturally-occurring protein. 
     In general, a nucleic acid encoding a recombinant protein is expressed in an eukaryotic cell (e.g., an yeast, animal, or plant cell) via genetic recombination to cause glycosylation of a recombinant protein. In the present invention, a sugar chain structure is not particularly limited, and it is considered to differ depending on a type of a cell selected for expression. When used for a human, a human-derived cell, an yeast cell capable of synthesizing a human sugar chain, a Chinese hamster ovary (CHO) cell, or the like can be used. 
     It is preferable that acetylation or amidation be mainly carried out at the protein N- or C-terminus. Such reaction can be carried out with the use of, for example, an alcohol, such as aliphatic alcohol or fatty acid, or a carboxylic acid. The number of carbon atoms in the alkyl moiety is, for example, about 1 to 20; however, conditions in terms of water-solubility and avirulence need to be satisfied. 
     &lt;Nucleic Acid and Vector&gt; 
     As an active ingredient of a composition of the present invention, vectors comprising nucleic acids encoding a protein comprising the truncated forms of extracellular region protein and mutants thereof are also included. 
     In the present invention, “nucleic acid” includes both DNA and RNA. DNA includes genomic DNA or cDNA, and RNA includes mRNA. 
     With respect to the truncated form of extracellular region protein, the mutant thereof and the protein comprising the same, including the fusion protein with Fc protein, are as described in the above sections of &lt;Truncated form of extracellular region protein of Frizzled receptor&gt;, &lt;Mutant of truncated form of extracellular region protein&gt; and &lt;Protein comprising truncated form or mutant thereof of extracellular region protein&gt;, and all descriptions made in such sections are employed herein. Accordingly, “nucleic acid” used in the present invention encompasses the nucleic acid encoding a protein comprising the extracellular cysteine-rich domain or a mutant thereof specifically described above. 
     Specifically, DNAs include DNAs encoding amino acid sequence comprising CRD minimal sequence (SEQ ID NO:102) comprising at least from N-terminal the first cysteine residue to C-terminal the tenth cysteine residue in amino acid sequence of the extracellular region protein (SEQ ID NO:1) of human Frizzled 2. 
     In view of DNAs expression in an eukaryotic cell and extracellular secretion of the expression product, it is preferable that a nucleotide sequence encoding a signal sequence be further included. Examples of signal sequences include a signal sequence derived from a Frizzled receptor protein, a signal sequence derived from human CD33, a signal sequence derived from human serum albumin, and a signal sequence derived from human preprotrypsin. 
     More specifically, DNAs of the present invention may include the following sequences. 
     
       
         
           
               
            
               
                 DNA encoding Human Frizzled 2 extracellular 
               
               
                 region protein (SEQ ID NO: 2): 
               
               
                 CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACGGCTTCTGCC 
               
               
                   
               
               
                 AGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACCAT 
               
               
                   
               
               
                 CATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAG 
               
               
                   
               
               
                 GTGCACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGC 
               
               
                   
               
               
                 GCTTCTTCCTGTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACA 
               
               
                   
               
               
                 GGCCATCCCGCCGTGCCGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGC 
               
               
                   
               
               
                 GAAGCCCTCATGAACAAGTTCGGTTTTCAGTGGCCCGAGCGCCTGCGCT 
               
               
                   
               
               
                 GCGAGCACTTCCCGCGCCACGGCGCCGAGCAGATCTGCGTCGGCCAGAA 
               
               
                   
               
               
                 CCACTCCGAGGACGGAGCTCCCGCGCTACTCACCACCGCGCCGCCGCCG 
               
               
                   
               
               
                 GGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCGGGCGGCGGCG 
               
               
                   
               
               
                 GCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCCCGCG 
               
               
                   
               
               
                 CGTCCTCAAGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGT 
               
               
                   
               
               
                 GATTGTGCTGCGCCCTGCGAACCTGCGCGGCCCGATGGTTCCATGTTCT 
               
               
                   
               
               
                 TCTCACAGGAGGAGACGCGTTTCGCGCGC 
               
            
           
         
       
     
     In the present invention, a DNA includes a DNA encoding a fusion protein of a protein comprising the truncated form of extracellular region protein of Frizzled receptor or a mutant thereof and a foreign protein as defined above. Preferred example of a foreign protein may include an immunoglobulin Fc protein derived from mammals, and a human Fc protein is particularly preferred. A variation may preferably be introduced into the protein to reduce or eliminate bioactivity thereof (in particular, ADCC and CDC). 
     For example, nucleotide sequence encoding a variant human IgG1-derived Fc protein is shown in SEQ ID NO:4. Further, preferred sequences as nucleotide sequence encoding a fusion proteins of the variant human IgG1-derived Fc protein and truncated forms of the extracellular region protein of human Frizzled 2 receptor are shown in SEQ ID NOs:42 to 64. 
     Nucleotide sequence encoding the amino acids of cysteine-rich domain (CRD) (minimal region sequence of CRD) from N-terminal the first cysteine residue to the tenth cysteine residue of the extracellular region protein of human Frizzled 2 is as follows: 
     
       
         
           
               
            
               
                 SEQ ID NO: 103 (Minimal region sequence of CRD of 
               
               
                 human Frizzled 2): 
               
               
                 TGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGA 
               
               
                   
               
               
                 CCATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCT 
               
               
                   
               
               
                 AGAGGTGCACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAA 
               
               
                   
               
               
                 CTGCGCTTCTTCCTGTGCTCCATGTACGCACCCGTGTGCACCGTGCTGG 
               
               
                   
               
               
                 AACAGGCCATCCCGCCGTGCCGCTCTATCTGTGAGCGCGCGCGCCAGGG 
               
               
                   
               
               
                 CTGCGAAGCCCTCATGAACAAGTTCGGTTTTCAGTGGCCCGAGCGCCTG 
               
               
                   
               
               
                 CGCTGCGAGCACTTCCCGCGCCACGGCGCCGAGCAGATCTGC 
               
            
           
         
       
     
     The above nucleotide sequences encoding fusion proteins may additionally include nucleotide sequences encoding signal sequences. Examples of signal sequences may include signal sequences derived from human proteins such as human Frizzled 2, signal sequences derived from human CD33, signal sequences derived from human serum albumin, signal sequences derived from human preprotrypsin or the like. 
     Homologs of nucleic acids encoding the proteins can be obtained from cDNA libraries prepared from cells or tissues that are known to express genes derived from mammalian animals other than humans via well-known techniques involving the use of primers or probes prepared based on cDNAs synthesized from mRNAs encoding the human derived Frizzled 2 genes. Examples of such techniques include PCR and hybridization (e.g., Southern or Northern hybridization). 
     PCR stands for a polymerase chain reaction, which involves about 25 to 40 cycles of a reaction cycle comprising a denaturing process for dissociating double-stranded DNA into single-stranded DNA (about 94° C. to 96° C. for about 30 seconds to 1 minute), an annealing process for binding a primer to template single-stranded DNA (about 55° C. to 68° C. for about 30 seconds to 1 minute), and an extension process for extending a DNA strand (about 72° C. for about 30 seconds to 1 minute). 
     Also, a pre-heating process can be carried out at about 94° C. to 95° C. for about 5 to 12 minutes prior to the denaturing process and another extension reaction can be carried out at 72° C. for about 7 to 15 minutes after the final cycle of the extension process. PCR is carried out using a commercially available thermal cycler in a PCR buffer containing, for example, thermostable DNA polymerase (e.g., AmpliTaq Gold® (Applied Biosystems)), MgCl 2 , and dNTP (e.g., dATP, dGTP, dCTP, or dTTP) in the presence of sense and antisense primers (size: about 17 to 30 bases, preferably 20 to 25 bases) and template DNA. Amplified DNA can be separated and purified via agarose gel electrophoresis (ethidium bromide staining). 
     Hybridization is a technique comprising forming a double strand with an about 20 to 100 bases or longer label probe and detecting a target nucleic acid. In order to enhance selectivity, hybridization can be generally carried out under stringent conditions. 
     Under stringent conditions, for example, hybridiztion is carried out in the presence of about 1 to 5×SSC at room temperature to about 40° C., and washing is then carried out in the presence of about 0.1 to 1×SSC and 0.1% SDS at about 45° C. to 65° C. The term “1×SSC” used herein refers to a solution comprising 150 mM NaCl and 15 mM Na-citrate (pH 7.0). Under such conditions, nucleic acids having sequence identity of 80% or higher, and preferably 85% or higher, can be detected. 
     The DNA is inserted into a vector, and the resulting vector is used for the production of a protein as an active ingredient of the pharmaceutical composition of the present invention, or such vector is formulated into and used for a pharmaceutical composition. 
     Examples of such a vector may include plasmid, phage or virus vectors. Examples of plasmid may include, but not limited to,  Escherichia coli -derived plasmid (such as pRSET, pTZ19R, pBR322, pBR325, pUC118 or pUC119),  Bacillus subtilis -derived plasmid (such as pUB110 or pTP5), yeast-derived plasmid (such as YEp13, YEp24 or YCp50), Ti plasmid and the like. 
     Examples of phage may include λ phage and the like. Examples of virus vectors may include animal virus vectors, such as retrovirus, vaccinia virus, lentivirus, adenovirus, and adeno-associated virus vectors, and insect virus vectors, such as a baculovirus vector. 
     Such vector may comprise a polylinker or a multicloning site to introduce a target DNA, and also may comprise several control elements to express the target DNA. Examples of control elements may include promoters, enhancers, poly A addition signals, replication origins, selective markers, liposome binding sequences, terminators or the like. 
     Examples of selection markers include drug-resistant genes (e.g., neomycin-resistant genes, ampicillin-resistant genes, kanamycin-resistant genes, and puromycin-resistant genes) and auxotrophic complementary genes (e.g., dihydrofolate reductase (DHFR) genes, HIS3 genes, LEU2 genes, and URA3 genes). 
     Promoters occasionally vary depending on host cells. Examples of host cells include, but are not limited to: bacteria of the genus  Escherichia  such as  E. coli , the genus  Bacillus  such as  Bacillus subtilis , and the genus  Pseudomonas  such as  Pseudomonas putida ; yeast of the genus  Saccharomyces  such as  Saccharomyces cerevisae  and  Schizosaccharomyces pombe , the genus  Candida , and the genus  Pichia ; animal cells, such as CHO, COS, HEK293, NIH3T3, and NS0; insect cells, such as Sf9 and Sf21; plant cells and the like. 
     When bacterial host cells such as  E. coli  cells are used, examples of promoters include trp promoters, lac promoters, and PL or PR promoters. 
     When yeast hosts are used, examples of promoters include gall promoters, gal 10 promoters, heat shock protein promoters, MFα1 promoters, PHO5 promoters, PGK promoters, GAP promoters, ADH promoters, AOX1 promoters and the like. 
     When animal host cells are used, examples of promoters include SRα promoter, SV40 promoter, LTR promoter, CMV promoter, human CMV early gene promoter, adenovirus late promoter, vaccinia virus 7.5K promoter, metallothionein promoter, polyhedrin promoter or the like. 
     When plant host cells are used, examples of promoter include CaMV promoter, TMV promoter or the like. 
     Examples of methods for transformation or transfection include electroporation, the spheroplast method, the lithium acetate method, the calcium phosphate method, the  Agrobacterium  method, the virus infection method, the liposome method, microinjection, the gene gun, lipofection and the like. 
     The transformed host cells are cultured under the conditions that are suitable for types of bacteria, yeast, animal cells, or plant cells, and target proteins are recovered from the cells or the culture solution. 
     Microorganisms are cultured with the use of a medium containing carbon sources, nitrogen sources, inorganic salts, and the like assimilable by microorganisms. Examples of carbon sources that can be used include carbohydrates, such as glucose, fructose, sucrose, starch and the like, organic acids, such as acetic acid, propionic acid and the like, and alcohols, such as ethanol, propanol and the like. 
     Examples of nitrogen sources that can be used include ammonium salts of inorganic acids or organic acids, such as ammonia, ammonium chloride, ammonium sulfate, ammonium acetate, and ammonium phosphate, peptone, meat extract, corn steep liquor and the like. 
     Examples of inorganic substances that can be used include monopotassium phosphate, dipotassium phosphate, magnesium phosphate, magnesium sulfate, sodium chloride, ferrous sulfate, manganese sulfate, copper sulfate, calcium carbonate and the like. 
     Animal cells may be cultured by using DMEM, RPMI1640 medium or the like as base medium which is supplemented with substances such as bovine fetus serum (FCS) and the like. 
     A target protein can be recovered by common methods used in protein purification as described above, including ammonium sulfate precipitation, organic solvent precipitation, dialysis, electrophoresis, chromatofocusing, gel filtration chromatography, ion exchange chromatography, affinity chromatography, HPLC and the like. 
     When a vector is used for a therapeutic purpose, a vector that is not incorporated into the subject&#39;s genome and is a virus or non-virus vector capable of infecting cells but is unreplicable is preferable. Examples of such vector include an adeno-associated virus vector and an adenovirus vector. These vectors may contain a promoter, an enhancer, a polyadenylation site, a selection marker, a reporter gene and the like. 
     Examples of virus vectors are vectors as listed in J. Virol. 67:5911-5921 (1993), Human Gene Therapy 5:717-729 (1994), Gene Therapy 1:51-58 (1994), Human Gene Therapy 5:793-801 (1994) or Gene Therapy 1:165-169 (1994); or improved vectors thereof. 
     Further, examples of nonvirus vectors include human artificial chromosome vectors that are composed of a chromosome fragment comprising human chromosome-derived ceturomere and telomere. Examples of human chromosome fragments include, but are not particularly limited to, a human chromosome 14 fragment and a human chromosome 21 fragment (e.g., JP Patent Publication (saihyo) No. 2004-031385 A and JP Patent Publication (kokai) No. 2007-295860 A). 
     The above-defined DNA is inserted into such the vector, and the DNA-inserted vector is administrated to a bone portion of a subject. Alternatively, the vector is introduced into a bone tissue or a cell obtained from a subject, and the bone tissue or cell is returned to the subject. 
     &lt;Production Method of Protein Comprising Truncated Form of Extracellular Region Protein of Frizzled 2&gt; 
     The present invention provides a method of producing a protein comprising a truncated form of an extracellular region protein of Frizzled 2. Specifically, the protein comprising a truncated form of an extracellular region protein of Frizzled 2 can be produced by using the above-mentioned DNA, vector, selective marker, promoter, host cell, transformant cell culture of microbes (including culture of animal cells), recover of target protein and the like, as well as methods known in the art. 
     &lt;Pharmaceutical Composition&gt; 
     Also, the present invention provides a composition for treating a bone disease comprising, as an active ingredient, a protein comprising a truncated form or a mutant thereof of an extracellular region protein of Frizzled 2 receptor as described above or a vector containing DNA encoding said protein. 
     Also, the present invention provides a method for treating a bone disease comprising administrating the above-mentioned composition for treating a bone disease to mammals. 
     In the present invention, the bone disease includes a disease involving a decrease in bone mass, bone density, and/or bone strength., for example osteoporosis, arthritis deformans, rheumatoid arthritis, malignant tumors, hypercalcemia, Paget disease of bone, marble disease, Camurati-Engelmann&#39;s disease, arthropathy, primary hyperthyroidism, osteopenia, osteoporosis, osteomalacia, rickets, bone diseases due to traumatic fracture or fatigue fracture, and related various bone diseases or disorders. 
     Examples of the malignant tumor includes osteoclastoma, osteosarcoma or multiple myeloma. Bone pain in multiple myeloma may be primarily exhibited in spinal cord and rib, and may be exacerbated due to exercise. If pain is sustained in the same site, pathologic fracture might occur. If there is a lesion in spine, spinal cord compression may be caused. 
     In multiple myeloma, IL-6 is released by proliferated tumor cells. IL-6 has been known as an osteoclast activating factor (OAF). As bone is absorbed and destroyed by IL-6-activated osteoclasts, X-ray photograph of bone suffering from multiple myeloma shows holes in bone (Punching image: “punched-out” resorptive lesions). Also, a concentration of calcium in blood due to bone destruction is increased, and hypercalcemia and various symptoms attributed to the hypercalcemia occur. 
     Osteoporosis includes primary osteoporosis and secondary osteoporosis. Examples of primary osteoporosis may include postmenopausal osteoporosis or age-related osteoporosis. Examples of secondary osteoporosis may include endocrinic (such as hyperparathyroidism, hyperthyroidism, hypogonadism, Cushing&#39;s syndrome, growth hormone deficiency, diabetes mellitus, Addison&#39;s disease and calcitonin deficiency); nutritional/metabolic (such as chronic wasting diseases, emaciation, severe hepatic diseases (particularly primary inflammatory liver cirrhosis), gastrectomy, scurvy, malabsorption syndrome (including celiac disease), hypophosphatemia, chronic renal diseases, idiopathic hypercalciuria, hemochromatosis, amyloidosis, mastocytoma, excessive sodium intake, calcium deficiency and D, A-hypervitaminosis); inflammatory (such as rheumatoid arthritis, periarticular osteoporosis (bone resorption enhancement by inflammatory cytokines) and sarcoidosis); immotile (such as systemic, bed ridden, paralysis, topical and postfracture disorders); drug-induced diseases (such as steroids (Immunosuppressive drugs which are widely used in inflammatory diseases; Diseases treated with steroids include collagen disease, asthma, ulcerative colitis and organ transplantation. Bone loss is a severe side effect due to this therapy), methotrexate, heparin, warfarin, anticonvulsants, lithium and tamoxifen); hematologic (such as multiple myeloma, lymphoma, leukemia, hemophilia and chronic hemolytic diseases); congenital (such as osteogenesis imperfecta, Marfan syndrome, Klinefelter&#39;s syndrome, congenital erythropoietic porphyria and cystic fibrosis); and other causative diseases (such as chronic obstructive pulmonary diseases, hepatic diseases, renal diseases, rheumatoid arthritis, pregnancy, hyperoxia and HIV infection). 
     Also, in the present invention, the bone disease includes a bone disease caused due to inhibition of only a calcification process such as rickets. 
     According to the present invention, a composition for treating a bone disease acts, specifically on bone portions, to increase bone mass, bone density and/or bone strength, when it is administrated to mammals with a bone disease, preferably the mammals with a disease involving the decrease of bone mass, bone density and/or bone strength. The composition at least enables increase in the cancellous bone and thickening and proliferation of the diaphysis. Thus, as the composition for treating bone diseases of the present invention is specific to bone portions, it has a surprising advantage that it causes no or little side effect on other tissues. 
     EXAMPLES 
     Example 1 
     1-1. Production of hFZD2-hFcm 
     For a fusion protein of a truncated form of human Frizzled 2 extracellular region protein and a human IgG1Fc variant (hereinafter, hFZD2-hFcm), fusion proteins were produced using truncated forms having different amino acid length of the extracellular region protein and the human IgG1Fc variant. 
     Specifically, total 31 truncated forms of Frizzled 2 extracellular region protein were produced with respect to the truncated form of human Frizzled 2 extracellular region protein, and each of these truncated forms had amino acids from the amino acid at position 1 of N-terminal to any one of amino acids at positions 140, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 178, 184, 190, 197, 210, 216 or 222 of Frizzled 2 extracellular region protein represented by SEQ ID NO:1. 
     Hereinafter, fusion proteins of truncated forms of human Frizzled 2 extracellular region protein, which have each of amino acid lengths listed above, and the human IgG1Fc variant are designated as hFZD2(X)-hFcm, and a length of amino acids is denoted in parentheses. 
     
       
         
           
               
               
            
               
                 SEQ ID NO: 1 (Amino acid sequence of human Frizzled 
                   
               
               
                 2 extracellular region protein): 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVPSYLSYKFLGERDCAAPCEPARPDGSMFFSQEETRFAR 
               
               
                   
               
               
                 SEQ ID NO: 2 (Nucleotide sequence of DNA encoding 
               
               
                 human Frizzled 2 extracellular region protein): 
               
               
                 CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACGGCTTCTGCCAGCCCA 
               
               
                 TCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACCATCATGCCCAACCTT 
               
               
                 CTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTGCACCAGTTCTATCCG 
               
               
                 CTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCTGTGCTCCATGTACGC 
               
               
                 ACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGCCGCTCTATCTGTGAG 
               
               
                 CGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCGGTTTTCAGTGGCCCG 
               
               
                 AGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGAGCAGATCTGCGTCG 
               
               
                 GCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACCACCGCGCCGCCGC 
               
               
                 CGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCGGGCGGCGGCGGC 
               
               
                 GCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCCCGCGCGTCCTCA 
               
               
                 AGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGTGATTGTGCTGCGCCC 
               
               
                 TGCGAACCTGCGCGGCCCGATGGTTCCATGTTCTTCTCACAGGAGGAGACGCGTT 
               
               
                 TCGCGCGC 
               
               
                   
               
               
                 SEQ ID NO: 3 (Amino acid sequence of human IgG1Fc variant): 
               
               
                 AEPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEV 
               
               
                 KFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKA 
               
               
                 LPASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQ 
               
               
                 PENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSL 
               
               
                 SPGK 
               
               
                   
               
               
                 SEQ ID NO: 4 (Nucleotide sequence of DNA encoding human 
               
               
                 IgG1Fc variant): 
               
               
                 GCCGAGCCTAGGTCTTCAGACAAAACTCACACATGCCCACCGTGCCCAGCACCTG 
               
               
                 AAGCCGAGGGGGCCCCGTCAGTCTTCCTCTTCCCCCCAAAACCCAAGGACACCCT 
               
               
                 CATGATCTCCCGGACCCCTGAGGTCACATGCGTGGTGGTGGACGTGAGCCACGAA 
               
               
                 GACCCTGAGGTCAAGTTCAACTGGTACGTGGACGGCGTGGAGGTGCATAATGCCA 
               
               
                 AGACAAAGCCGCGGGAGGAGCAGTACAACAGCACGTACCGTGTGGTCAGCGTCC 
               
               
                 TCACCGTCCTGCACCAGGACTGGCTGAATGGCAAGGAGTACAAGTGCGCCGTCTC 
               
               
                 CAACAAAGCCCTCCCAGCCTCCATCGAGAAAACCATCTCCAAAGCCAAAGGGCA 
               
               
                 GCCCCGAGAACCACAGGTGTACACCCTGCCCCCATCCCGGGATGAGCTGACCAAG 
               
               
                 AACCAGGTCAGCCTGACCTGCCTGGTCAAAGGCTTCTATCCCAGCGACATCGCCG 
               
               
                 TGGAGTGGGAGAGCAATGGGCAGCCGGAGAACAACTACAAGACCACGCCTCCCG 
               
               
                 TGCTGGACTCCGACGGCTCCTTCTTCCTCTACAGCAAGCTCACCGTGGACAAGAG 
               
               
                 CAGGTGGCAGCAGGGGAACGTCTTCTCATGCTCCGTGATGCATGAGGCTCTGCAC 
               
               
                 AACCACTACACGCAGAAGAGCCTCTCCCTGTCTCCGGGTAAATGA 
               
            
           
         
       
     
     1-1-1. Construction of pLN1V5 Vector 
     Sense oligo DNA (V5S) having the BamHI, NheI, and SalI sites at the 5′ terminus and the XhoI site at the 3′ terminus (a V5 tag and a stop codon) and corresponding antisense oligo DNA (V5AS) were synthesized. 
     
       
         
           
               
            
               
                 V5S: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 5) 
               
            
           
           
               
            
               
                 GATCCGCTAGCGTCGACGGTAAGCCTATCCCTAACCCTCTCCTCGGTCTC 
               
               
                 GATTCTACGTGAC 
               
               
                   
               
               
                 V5AS: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 6) 
               
            
           
           
               
            
               
                 TCGAGTCACGTAGAATCGAGACCGAGGAGAGGGTTAGGGATAGGCTTACC 
               
               
                 GTCGACGCTAGCG 
               
            
           
         
       
     
     Oligo DNA synthesized above was introduced into the BamHI-XhoI site on the pLN1 vector described in the report of Kakeda et al. (Gene Ther., 12, 852-856, 2005) to construct the pLN1V5 vector. 
     1-1-2. Synthesis of hFZD2(140)-hFcm DNA Fragment 
     
       
         
           
               
               
            
               
                   
                 BHI-kozak-hFZD2-F: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 7) 
               
            
           
           
               
               
            
               
                   
                 CGGGATCCACC ATGCGGCCCCGCAGCGCCC 
               
               
                   
                   
               
               
                   
                 hFc-NotI-Rv: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 8) 
               
            
           
           
               
               
            
               
                   
                 ATAGTTTAGCGGCCGCTCATTTACCCGGAGACAGG 
               
            
           
         
       
     
     A reaction solution was prepared using Prime STAR HS DNA Polymerase (Takara Bio Inc., Japan) in accordance with the instructions, 10 pmol each primers shown in SEQ ID NOs: 7 and 8 and hFZD2(140)-hFcm (SEQ ID NO: 9) as a template were added to 50 μl of the reaction solution, the resultant was incubated at 98° C. for 1 minute, an amplification cycle of 98° C. for 10 seconds, 62° C. for 5 seconds, and 72° C. for 1 minutes was repeated 30 times, and the resulting 1218-bp amplified fragment was separated and recovered with 0.8% gel. The amplified fragment was recovered from the gel using the QIAquick Gel Extraction Kit (Qiagen, Japan) in accordance with the instructions. 
     1-1-3. Construction of hFZD2(140)-hFcm Recombinant Expression Vector 
     The PCR-amplified fragment recovered in Example 1-1-2 was digested with the BamHI and NotI restriction enzymes (Roche Diagnostics, K. K., Japan), and the resultant was separated and recovered with 0.8% agarose gel. The enzyme-treated fragment was recovered from the gel using the QIAquick Gel Extraction Extraction Kit (Qiagen, Japan) in accordance with the instructions. A vector was prepared by adding NotI site to pLN1V5 vector from Example 1-1-1. The enzyme treated fragment was introduced into BamHI•NotI site of the above vector to construct the hFZD2(140)-hFcm recombinant expression vector ( FIG. 1 ). 
     A polynucleotide sequence (1,191 bp, SEQ ID NO:9) comprising a region from the initiation codon to the termination codon of hFZD2(140)-hFcm recombinant cDNA and the amino acid sequence (396 amino acids, SEQ ID NO:10) comprising a signal sequence of hFZD2(140)-hFcm encoded by the cDNA are shown below. 
     
       
         
           
               
               
            
               
                 SEQ ID NO: 9: 
                   
               
               
                 ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
               
               
                 CCGCCGGGCCGGCCCAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTAGCCGA 
               
               
                 GCCTAGGTCTTCAGACAAAACTCACACATGCCCACCGTGCCCAGCACCTGAAGCC 
               
               
                 GAGGGGGCCCCGTCAGTCTTCCTCTTCCCCCCAAAACCCAAGGACACCCTCATGA 
               
               
                 TCTCCCGGACCCCTGAGGTCACATGCGTGGTGGTGGACGTGAGCCACGAAGACC 
               
               
                 CTGAGGTCAAGTTCAACTGGTACGTGGACGGCGTGGAGGTGCATAATGCCAAGAC 
               
               
                 AAAGCCGCGGGAGGAGCAGTACAACAGCACGTACCGTGTGGTCAGCGTCCTCAC 
               
               
                 CGTCCTGCACCAGGACTGGCTGAATGGCAAGGAGTACAAGTGCGCCGTCTCCAAC 
               
               
                 AAAGCCCTCCCAGCCTCCATCGAGAAAACCATCTCCAAAGCCAAAGGGCAGCCC 
               
               
                 CGAGAACCACAGGTGTACACCCTGCCCCCATCCCGGGATGAGCTGACCAAGAACC 
               
               
                 AGGTCAGCCTGACCTGCCTGGTCAAAGGCTTCTATCCCAGCGACATCGCCGTGGA 
               
               
                 GTGGGAGAGCAATGGGCAGCCGGAGAACAACTACAAGACCACGCCTCCCGTGCT 
               
               
                 GGACTCCGACGGCTCCTTCTTCCTCTACAGCAAGCTCACCGTGGACAAGAGCAGG 
               
               
                 TGGCAGCAGGGGAACGTCTTCTCATGCTCCGTGATGCATGAGGCTCTGCACAACC 
               
               
                 ACTACACGCAGAAGAGCCTCTCCCTGTCTCCGGGTAAATGA 
               
               
                   
               
               
                 SEQ ID NO: 10: 
               
               
                 MRPRSALPRLLLPLLLLPAAGPAQFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNL 
               
               
                 LGHTNQEDAGLEVHQFYPLVKVQCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERAR 
               
               
                 QGCEALMNKFGFQWPERLRCEHFPRHGAEQICVGQNHSEDGAPALAEPRSSDKTHT 
               
               
                 CPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGV 
               
               
                 EVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKA 
               
               
                 KGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPV 
               
               
                 LDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
            
           
         
       
     
     1-1-4. Synthesis of hFZD2(X)-hFcm (X=153-175, 178, 184, 190, 197, 210, 216, 222) DNA Fragments 
     
       
         
           
               
               
            
               
                   
                 hFZD2-t(153)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 11) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCACCCGGGGTGCCC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(154)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 12) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCCCGGCACCCGGCTGC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(155)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 13) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCCCCGGCACCCGGC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(156)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 14) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGGTGCCCCCGGCACCC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(157)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 15) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCGGGGTGCCCCCGGCA 
               
               
                   
                   
               
               
                   
                 hFZD2-t(158)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 16) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCACCCGGGGTGCCCCCG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(159)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 17) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCACCCGGGGTGCCC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(160)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 18) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCGGGCCACCCGGGGTG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(161)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 19) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCCGGGCCACCCGGG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(162)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 20) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCGCCCGGGCCACCC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(163)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 21) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCGCCGCCCGGGCCA 
               
               
                   
                   
               
               
                   
                 hFZD2-t(164)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 22) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCCGCCGCCGCCCGGG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(165)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 23) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCAGCGCCGCCGCCGCCC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(166)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 24) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGGGAGCGCCGCCGCCG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(167)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 25) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCGGGGGAGCGCCGCCG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(168)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 26) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCGCGGGGGAGCGCCG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(169)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 27) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGTAGCGCGGGGGAGCG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(170)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 28) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGGCGTAGCGCGGGGGA 
               
               
                   
                   
               
               
                   
                 hFZD2-t(171)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 29) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCGTGGCGTAGCGCGGG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(172)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 30) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCAGCGTGGCGTAGCGC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(173)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 31) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCTCCAGCGTGGCGTAG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(174)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 32) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGTGCTCCAGCGTGGCG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(175)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 33) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGGGGTGCTCCAGCGTG 
               
               
                   
                   
               
               
                   
                 hFZD2-t(178)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 34) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCAGTGGAAGGGGTGC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(184)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 35) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCACCTTGAGGACGCGC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(190)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 36) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGTAGCTGAGATAGGAT 
               
               
                   
                   
               
               
                   
                 hFZD2-t(197)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 37) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCATCACGCTCGCCCAGA 
               
               
                   
                   
               
               
                   
                 hFZD2-t(210)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 38) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGGAACCATCGGGCCGC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(216)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 39) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCCTCCTGTGAGAAGAAC 
               
               
                   
                   
               
               
                   
                 hFZD2-t(222)-AvrII-R: 
               
            
           
           
               
            
               
                 (SEQ ID NO: 40) 
               
            
           
           
               
               
            
               
                   
                 CGCCTAGGCTCGGCGCGCGCGAAACGCGTC 
               
            
           
         
       
     
     A reaction solution was prepared using Prime STAR HS DNA Polymerase (TAKARA BIO INC., Japan) in accordance with the instructions, 10 pmol each primers shown in SEQ ID NO:7 as a Fw primer and SEQ ID NOs:11 to 40 as a Rv primer and hFZD2 (SEQ ID NO:41) as a template were added to 50 μl of the reaction solution, the resultant was incubated at 98° C. for 1 minute, an amplification cycle of 98° C. for 10 seconds, 62° C. for 5 seconds, and 72° C. for 1 minutes was repeated 30 times, and the resulting 553-760 bp amplified fragment was separated and recovered with 0.8% gel. The amplified fragment (hFZD2(X)-hFcm) was recovered from the gel using the QIAquick Gel Extraction Kit (Qiagen, Japan) in accordance with the instructions. 
     
       
         
           
               
               
            
               
                 SEQ ID NO: 41: 
                   
               
               
                 ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
               
               
                   
               
               
                 CCGCCGGGCCGGCCCAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                   
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                   
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                   
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                   
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                   
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                   
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                   
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                   
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                   
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                   
               
               
                 CGCGCGTCCTCAAGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGTGAT 
               
               
                   
               
               
                 TGTGCTGCGCCCTGCGAACCTGCGCGGCCCGATGGTTCCATGTTCTTCTCACAGG 
               
               
                   
               
               
                 AGGAGACGCGTTTCGCGCGCCTCTGGATCCTCACCTGGTCGGTGCTGTGCTGCGC 
               
               
                   
               
               
                 TTCCACCTTCTTCACTGTCACCACGTACTTGGTAGACATGCAGCGCTTCCGCTACC 
               
               
                   
               
               
                 CAGAGCGGCCTATCATTTTTCTGTCGGGCTGCTACACCATGGTGTCGGTGGCCTAC 
               
               
                   
               
               
                 ATCGCGGGCTTCGTGCTCCAGGAGCGCGTGGTGTGCAACGAGCGCTTCTCCGAGG 
               
               
                   
               
               
                 ACGGTTACCGCACGGTGGTGCAGGGCACCAAGAAGGAGGGCTGCACCATCCTCT 
               
               
                   
               
               
                 TCATGATGCTCTACTTCTTCAGCATGGCCAGCTCCATCTGGTGGGTCATCCTGTCGC 
               
               
                   
               
               
                 TCACCTGGTTCCTGGCAGCCGGCATGAAGTGGGGCCACGAGGCCATCGAGGCCA 
               
               
                   
               
               
                 ACTCTCAGTACTTCCACCTGGCCGCCTGGGCCGTGCCGGCCGTCAAGACCATCAC 
               
               
                   
               
               
                 CATCCTGGCCATGGGCCAGATCGACGGCGACCTGCTGAGCGGCGTGTGCTTCGTA 
               
               
                   
               
               
                 GGCCTCAACAGCCTGGACCCGCTGCGGGGCTTCGTGCTAGCGCCGCTCTTCGTGT 
               
               
                   
               
               
                 ACCTGTTCATCGGCACGTCCTTCCTCCTGGCCGGCTTCGTGTCGCTCTTCCGCATC 
               
               
                   
               
               
                 CGCACCATCATGAAGCACGACGGCACCAAGACCGAAAAGCTGGAGCGGCTCATG 
               
               
                   
               
               
                 GTGCGCATCGGCGTCTTCTCCGTGCTCTACACAGTGCCCGCCACCATCGTCATCGC 
               
               
                   
               
               
                 TTGCTACTTCTACGAGCAGGCCTTCCGCGAGCACTGGGAGCGCTCGTGGGTGAGC 
               
               
                   
               
               
                 CAGCACTGCAAGAGCCTGGCCATCCCGTGCCCGGCGCACTACACGCCGCGCATGT 
               
               
                   
               
               
                 CGCCCGACTTCACGGTCTACATGATCAAATACCTCATGACGCTCATCGTGGGCATC 
               
               
                   
               
               
                 ACGTCGGGCTTCTGGATCTGGTCGGGCAAGACGCTGCACTCGTGGAGGAAGTTCTACAC 
               
               
                   
               
               
                 TCGCCTCACCAACAGCCGACACGGTGAGACCACCGTGTGA 
               
            
           
         
       
     
     1-1-5. Construction of hFZD2(X)-hFcm (X=153-175, 178, 184, 190, 197, 210, 216, 222) Recombinant Expression Vectors 
     Each of the PCR-amplified fragment recovered in Example 1-1-4 was digested with the BamHI and AvrII restriction enzymes (Roche Diagnostics, K. K., Japan), and the resultant was separated and recovered with 0.8% agarose gel. The enzyme-treated fragment was recovered from the gel using the QIAquick Gel Extraction Extraction Kit (Qiagen, Japan) in accordance with the instructions. A vector was prepared by digesting hFZD2(140)-hFcm recombinant expression vector from Example 1-1-3 with BamHI and AvrII. The enzyme treated fragments were introduced to BamHI•AvrII site of the above vector to construct recombinant expression vectors ( FIG. 2 ). 
     A polynucleotide sequence (1, 230-1437 bp, SEQ ID NO:42-71) comprising a region from the initiation codon to the termination codon of hFZD2(X)-hFcm recombinant cDNA and the amino acid sequence (409-478 amino acids, SEQ ID NO:72-101) comprising a signal sequence of hFZD2(140)-hFcm encoded by the cDNA are shown below. 
     In these polynucleotide sequences, 69 bases from N-terminal represent signal sequence, capital letters represent the truncated form of hFZD2 extracellular region, and small letters represents human IgG1Fc variant portions. Also, in amino acid sequence, 233 amino acids from C-terminal represent human IgG1Fc variant portions, and sequence toward N-terminal therefrom represents the truncated form of hFZD2 extracellular region protein. Also, amino acid sequence does not comprise signal sequence. 
     
       
         
           
               
               
            
               
                 SEQ ID NO: 42 [Polynucleotide sequence of hFZD2(153)-hFcm]: 
                   
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCgccgagcctaggtcttcagacaa 
               
               
                 aactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtctt 
               
               
                 cctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcac 
               
               
                 atgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgt 
               
               
                 ggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacag 
               
               
                 cacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaa 
               
               
                 ggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccat 
               
               
                 ctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccg 
               
               
                 ggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcc 
               
               
                 cagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagac 
               
               
                 cacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgt 
               
               
                 ggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggc 
               
               
                 tctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 43 [Polynucleotide sequence of hFZD2(154)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGgccgagcctaggtcttcagac 
               
               
                 aaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtc 
               
               
                 ttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtc 
               
               
                 acatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtac 
               
               
                 gtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaac 
               
               
                 agcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggc 
               
               
                 aaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaacc 
               
               
                 atctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcc 
               
               
                 cgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctat 
               
               
                 cccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaag 
               
               
                 accacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcacc 
               
               
                 gtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgag 
               
               
                 gctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 44 [Polynucleotide sequence of hFZD2(155)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCgccgagcctaggtcttca 
               
               
                 gacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtca 
               
               
                 gtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgag 
               
               
                 gtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactgg 
               
               
                 tacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtac 
               
               
                 aacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaat 
               
               
                 ggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaa 
               
               
                 accatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgccccca 
               
               
                 tcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttc 
               
               
                 tatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactac 
               
               
                 aagaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctc 
               
               
                 accgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcat 
               
               
                 gaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 45 [Polynucleotide sequence of hFZD2(156)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCgccgagcctaggtct 
               
               
                 tcagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccg 
               
               
                 tcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccct 
               
               
                 gaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaac 
               
               
                 tggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcag 
               
               
                 tacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctg 
               
               
                 aatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgag 
               
               
                 aaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgccc 
               
               
                 ccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggc 
               
               
                 ttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaac 
               
               
                 tacaagaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaag 
               
               
                 ctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatg 
               
               
                 catgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaa 
               
               
                 tga 
               
               
                   
               
               
                 SEQ ID NO: 46 [Polynucleotide sequence of hFZD2(157)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGgccgagcctagg 
               
               
                 tcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggcc 
               
               
                 ccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacc 
               
               
                 cctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttc 
               
               
                 aactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggag 
               
               
                 cagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactgg 
               
               
                 ctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatc 
               
               
                 gagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctg 
               
               
                 cccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaa 
               
               
                 ggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaac 
               
               
                 aactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctacagc 
               
               
                 aagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtg 
               
               
                 atgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggt 
               
               
                 aaatga 
               
               
                   
               
               
                 SEQ ID NO: 47 [Polynucleotide sequence of hFZD2(158)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTgccgagcct 
               
               
                 aggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggg 
               
               
                 gccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccgg 
               
               
                 acccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaag 
               
               
                 ttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggag 
               
               
                 gagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggac 
               
               
                 tggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctcc 
               
               
                 atcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacacc 
               
               
                 ctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtc 
               
               
                 aaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggag 
               
               
                 aacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctac 
               
               
                 agcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctcc 
               
               
                 gtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccg 
               
               
                 ggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 48 [Polynucleotide sequence of hFZD2(159)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCgccg 
               
               
                 agcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccg 
               
               
                 agggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatct 
               
               
                 cccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgagg 
               
               
                 tcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgc 
               
               
                 gggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcacc 
               
               
                 aggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccag 
               
               
                 cctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgt 
               
               
                 acaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcc 
               
               
                 tggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagc 
               
               
                 cggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcc 
               
               
                 tctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcat 
               
               
                 gctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgt 
               
               
                 ctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 49 [Polynucleotide sequence of hFZD2(160)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 gccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaa 
               
               
                 gccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatg 
               
               
                 atctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctga 
               
               
                 ggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccg 
               
               
                 cgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcacc 
               
               
                 aggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctccca 
               
               
                 gcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgt 
               
               
                 acaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcc 
               
               
                 tggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagc 
               
               
                 cggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcc 
               
               
                 tctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcat 
               
               
                 gctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgt 
               
               
                 ctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 50 [Polynucleotide sequence of hFZD2(161)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacct 
               
               
                 gaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctc 
               
               
                 atgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagac 
               
               
                 cctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaa 
               
               
                 agccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcct 
               
               
                 gcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctc 
               
               
                 ccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacagg 
               
               
                 tgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctg 
               
               
                 cctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcag 
               
               
                 ccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcc 
               
               
                 tctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatg 
               
               
                 ctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtct 
               
               
                 ccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 51 [Polynucleotide sequence of hFZD2(162)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagca 
               
               
                 cctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacacc 
               
               
                 ctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacga 
               
               
                 agaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaa 
               
               
                 gacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctca 
               
               
                 ccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaa 
               
               
                 gccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaa 
               
               
                 ccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagc 
               
               
                 ctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagca 
               
               
                 atgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctc 
               
               
                 cttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtc 
               
               
                 ttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctct 
               
               
                 ccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 52 [Polynucleotide sequence of hFZD2(163)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccag 
               
               
                 cacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacac 
               
               
                 cctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacga 
               
               
                 agaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaa 
               
               
                 gacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcacc 
               
               
                 gtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaag 
               
               
                 ccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaacc 
               
               
                 acaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctg 
               
               
                 acctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatg 
               
               
                 ggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctcctt 
               
               
                 cttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttc 
               
               
                 tcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccc 
               
               
                 tgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 53 [Polynucleotide sequence of hFZD2(164)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgc 
               
               
                 ccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaag 
               
               
                 gacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagc 
               
               
                 cacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataat 
               
               
                 gccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtc 
               
               
                 ctcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctcca 
               
               
                 acaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccg 
               
               
                 agaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtc 
               
               
                 agcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggaga 
               
               
                 gcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacgg 
               
               
                 ctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaac 
               
               
                 gtcttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcc 
               
               
                 tctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 54 [Polynucleotide sequence of hFZD2(165)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccga 
               
               
                 gggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtg 
               
               
                 gacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcggg 
               
               
                 aggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgc 
               
               
                 gccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacac 
               
               
                 cctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgt 
               
               
                 ggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctaca 
               
               
                 gcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccactaca 
               
               
                 cgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 55 [Polynucleotide sequence of hFZD2(166)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaag 
               
               
                 ccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggt 
               
               
                 ggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccg 
               
               
                 cgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaa 
               
               
                 gtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgt 
               
               
                 acaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcg 
               
               
                 ccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctct 
               
               
                 acagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccact 
               
               
                 acacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 56 [Polynucleotide sequence of hFZD2(167)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacc 
               
               
                 tgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatg 
               
               
                 cgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaa 
               
               
                 agccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaagga 
               
               
                 gtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccac 
               
               
                 aggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcg 
               
               
                 acatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctcctt 
               
               
                 cttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcac 
               
               
                 aaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 57 [Polynucleotide sequence of hFZD2(168)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgccca 
               
               
                 gcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtc 
               
               
                 acatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaa 
               
               
                 gacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggc 
               
               
                 aaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgag 
               
               
                 aaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatc 
               
               
                 ccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacg 
               
               
                 gctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggct 
               
               
                 ctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 58 [Polynucleotide sequence of hFZD2(169)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACgccgagcctaggtcttcagacaaaactcacacatgcccaccgtg 
               
               
                 cccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctga 
               
               
                 ggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatg 
               
               
                 ccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaat 
               
               
                 ggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagcccc 
               
               
                 gagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttct 
               
               
                 atcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccga 
               
               
                 cggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgag 
               
               
                 gctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 59 [Polynucleotide sequence of hFZD2(170)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCgccgagcctaggtcttcagacaaaactcacacatgccca 
               
               
                 ccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacc 
               
               
                 cctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgca 
               
               
                 taatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggc 
               
               
                 tgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcag 
               
               
                 ccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaagg 
               
               
                 cttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggact 
               
               
                 ccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgca 
               
               
                 tgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 60 [Polynucleotide sequence of hFZD2(171)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGgccgagcctaggtcttcagacaaaactcacacatg 
               
               
                 cccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccg 
               
               
                 gacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggagg 
               
               
                 tgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggac 
               
               
                 tggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagg 
               
               
                 gcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtca 
               
               
                 aaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgct 
               
               
                 ggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtg 
               
               
                 atgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 61 [Polynucleotide sequence of hFZD2(172)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGgccgagcctaggtcttcagacaaaactcac 
               
               
                 acatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatc 
               
               
                 tcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgt 
               
               
                 ggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcac 
               
               
                 caggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagc 
               
               
                 caaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgc 
               
               
                 ctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcc 
               
               
                 cgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgc 
               
               
                 tccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 62 [Polynucleotide sequence of hFZD2(173)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGgccgagcctaggtcttcagacaaaa 
               
               
                 ctcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctca 
               
               
                 tgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacg 
               
               
                 gcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctg 
               
               
                 caccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaa 
               
               
                 agccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgac 
               
               
                 ctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacg 
               
               
                 cctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttct 
               
               
                 catgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 63 [Polynucleotide sequence of hFZD2(174)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACgccgagcctaggtcttcaga 
               
               
                 caaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggaca 
               
               
                 ccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgt 
               
               
                 ggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcacc 
               
               
                 gtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatc 
               
               
                 tccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcc 
               
               
                 tgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagacc 
               
               
                 acgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtc 
               
               
                 ttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 64 [Polynucleotide sequence of hFZD2(175)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCgccgagcctaggtctt 
               
               
                 cagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaag 
               
               
                 gacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactgg 
               
               
                 tacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcc 
               
               
                 tcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaa 
               
               
                 ccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggt 
               
               
                 cagcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactaca 
               
               
                 agaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcagggg 
               
               
                 aacgtcttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 65 [Polynucleotide sequence of hFZD2(178)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCg 
               
               
                 ccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttcc 
               
               
                 ccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgag 
               
               
                 gtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtacc 
               
               
                 gtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccag 
               
               
                 cctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctg 
               
               
                 accaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagcc 
               
               
                 ggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcag 
               
               
                 gtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccg 
               
               
                 ggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 66 [Polynucleotide sequence of hFZD2(184)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                 CGCGCGTCCTCAAGGTGgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagcc 
               
               
                 gagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggtg 
               
               
                 gtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgc 
               
               
                 gggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaag 
               
               
                 tgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgta 
               
               
                 caccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcgc 
               
               
                 cgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctcta 
               
               
                 cagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccacta 
               
               
                 cacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 67 [Polynucleotide sequence of hFZD2(190)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                 CGCGCGTCCTCAAGGTGCCATCCTATCTCAGCTACgccgagcctaggtcttcagacaaaactcacaca 
               
               
                 tgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcc 
               
               
                 cggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtgga 
               
               
                 ggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccag 
               
               
                 gactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaa 
               
               
                 agggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctg 
               
               
                 gtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgt 
               
               
                 gctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctcc 
               
               
                 gtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 68 [Polynucleotide sequence of hFZD2(197)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                 CGCGCGTCCTCAAGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGTGAT 
               
               
                 gccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttc 
               
               
                 cccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctga 
               
               
                 ggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtac 
               
               
                 cgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctccca 
               
               
                 gcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagct 
               
               
                 gaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagc 
               
               
                 cggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagca 
               
               
                 ggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctcc 
               
               
                 gggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 69 [Polynucleotide sequence of hFZD2(210)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                 CGCGCGTCCTCAAGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGTGAT 
               
               
                 TGTGCTGCGCCCTGCGAACCTGCGCGGCCCGATGGTTCCgccgagcctaggtcttcagacaaaac 
               
               
                 tcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcat 
               
               
                 gatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacg 
               
               
                 gcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctg 
               
               
                 caccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaa 
               
               
                 agccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgac 
               
               
                 ctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacg 
               
               
                 cctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttct 
               
               
                 catgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 70 [Polynucleotide sequence of hFZD2(216)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                 CGCGCGTCCTCAAGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGTGAT 
               
               
                 TGTGCTGCGCCCTGCGAACCTGCGCGGCCCGATGGTTCCATGTTCTTCTCACAGG 
               
               
                 AGgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctgaagccgagggggccccgtcagtcttcct 
               
               
                 cttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcgtggtggtggacgtgagccacgaagacc 
               
               
                 ctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaagccgcgggaggagcagtacaacagcac 
               
               
                 gtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagtacaagtgcgccgtctccaacaaagccct 
               
               
                 cccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacaggtgtacaccctgcccccatcccgggat 
               
               
                 gagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgacatcgccgtggagtgggagagcaatgg 
               
               
                 gcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttcttcctctacagcaagctcaccgtggacaa 
               
               
                 gagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaaccactacacgcagaagagcctctccct 
               
               
                 gtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 71 [Polynucleotide sequence of hFZD2(222)-hFcm]: 
               
               
                 
                   ATGCGGCCCCGCAGCGCCCTGCCCCGCCTGCTGCTGCCGCTGCTGCTGCTGCCCG 
                 
               
               
                   CCGCCGGGCCGGCC CAGTTCCACGGGGAGAAGGGCATCTCCATCCCGGACCACG 
               
               
                 GCTTCTGCCAGCCCATCTCCATCCCGCTGTGCACGGACATCGCCTACAACCAGACC 
               
               
                 ATCATGCCCAACCTTCTGGGCCACACGAACCAGGAGGACGCAGGCCTAGAGGTG 
               
               
                 CACCAGTTCTATCCGCTGGTGAAGGTGCAGTGCTCGCCCGAACTGCGCTTCTTCCT 
               
               
                 GTGCTCCATGTACGCACCCGTGTGCACCGTGCTGGAACAGGCCATCCCGCCGTGC 
               
               
                 CGCTCTATCTGTGAGCGCGCGCGCCAGGGCTGCGAAGCCCTCATGAACAAGTTCG 
               
               
                 GTTTTCAGTGGCCCGAGCGCCTGCGCTGCGAGCACTTCCCGCGCCACGGCGCCGA 
               
               
                 GCAGATCTGCGTCGGCCAGAACCACTCCGAGGACGGAGCTCCCGCGCTACTCACC 
               
               
                 ACCGCGCCGCCGCCGGGACTGCAGCCGGGTGCCGGGGGCACCCCGGGTGGCCCG 
               
               
                 GGCGGCGGCGGCGCTCCCCCGCGCTACGCCACGCTGGAGCACCCCTTCCACTGCC 
               
               
                 CGCGCGTCCTCAAGGTGCCATCCTATCTCAGCTACAAGTTTCTGGGCGAGCGTGAT 
               
               
                 TGTGCTGCGCCCTGCGAACCTGCGCGGCCCGATGGTTCCATGTTCTTCTCACAGG 
               
               
                 AGGAGACGCGTTTCGCGCGCgccgagcctaggtcttcagacaaaactcacacatgcccaccgtgcccagcacctg 
               
               
                 aagccgagggggccccgtcagtcttcctcttccccccaaaacccaaggacaccctcatgatctcccggacccctgaggtcacatgcg 
               
               
                 tggtggtggacgtgagccacgaagaccctgaggtcaagttcaactggtacgtggacggcgtggaggtgcataatgccaagacaaag 
               
               
                 ccgcgggaggagcagtacaacagcacgtaccgtgtggtcagcgtcctcaccgtcctgcaccaggactggctgaatggcaaggagta 
               
               
                 caagtgcgccgtctccaacaaagccctcccagcctccatcgagaaaaccatctccaaagccaaagggcagccccgagaaccacag 
               
               
                 gtgtacaccctgcccccatcccgggatgagctgaccaagaaccaggtcagcctgacctgcctggtcaaaggcttctatcccagcgac 
               
               
                 atcgccgtggagtgggagagcaatgggcagccggagaacaactacaagaccacgcctcccgtgctggactccgacggctccttctt 
               
               
                 cctctacagcaagctcaccgtggacaagagcaggtggcagcaggggaacgtcttctcatgctccgtgatgcatgaggctctgcacaa 
               
               
                 ccactacacgcagaagagcctctccctgtctccgggtaaatga 
               
               
                   
               
               
                 SEQ ID NO: 72 [Amino acid sequence of hFZD2(153)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAAEPRSSDKTHTCPPCPAPEAEG 
               
               
                 APSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPRE 
               
               
                 EQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREPQVYT 
               
               
                 LPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYS 
               
               
                 KLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 73 [Amino acid sequence of hFZD2(154)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGAEPRSSDKTHTCPPCPAPEAE 
               
               
                 GAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKP 
               
               
                 REEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREPQV 
               
               
                 YTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFL 
               
               
                 YSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 74 [Amino acid sequence of hFZD2(155)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGAEPRSSDKTHTCPPCPAPEA 
               
               
                 EGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTK 
               
               
                 PREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREPQ 
               
               
                 VYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFF 
               
               
                 LYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 75 [Amino acid sequence of hFZD2(156)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTAEPRSSDKTHTCPPCPAPE 
               
               
                 AEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKT 
               
               
                 KPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREP 
               
               
                 QVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSF 
               
               
                 FLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 76 [Amino acid sequence of hFZD2(157)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPAEPRSSDKTHTCPPCPAPE 
               
               
                 AEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKT 
               
               
                 KPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREP 
               
               
                 QVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSF 
               
               
                 FLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 77 [Amino acid sequence of hFZD2(158)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGAEPRSSDKTHTCPPCPA 
               
               
                 PEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNA 
               
               
                 KTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPR 
               
               
                 EPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDG 
               
               
                 SFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 78 [Amino acid sequence of hFZD2(159)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGAEPRSSDKTHTCPPCP 
               
               
                 APEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHN 
               
               
                 AKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQP 
               
               
                 REPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSD 
               
               
                 GSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 79 [Amino acid sequence of hFZD2(160)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPAEPRSSDKTHTCPPC 
               
               
                 PAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHN 
               
               
                 AKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQP 
               
               
                 REPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSD 
               
               
                 GSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 80 [Amino acid sequence of hFZD2(161)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGAEPRSSDKTHTCPP 
               
               
                 CPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVH 
               
               
                 NAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQ 
               
               
                 PREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDS 
               
               
                 DGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 81 [Amino acid sequence of hFZD2(162)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGAEPRSSDKTHTCP 
               
               
                 PCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEV 
               
               
                 HNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKG 
               
               
                 QPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLD 
               
               
                 SDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 82 [Amino acid sequence of hFZD2(163)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGAEPRSSDKTHT 
               
               
                 CPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGV 
               
               
                 EVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKA 
               
               
                 KGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPV 
               
               
                 LDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 83 [Amino acid sequence of hFZD2(164)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAEPRSSDKTH 
               
               
                 TCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDG 
               
               
                 VEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISK 
               
               
                 AKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPP 
               
               
                 VLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 84 [Amino acid sequence of hFZD2(165)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAAEPRSSDKT 
               
               
                 HTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVD 
               
               
                 GVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTIS 
               
               
                 KAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTP 
               
               
                 PVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 85 [Amino acid sequence of hFZD2(166)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPAEPRSSDKT 
               
               
                 HTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVD 
               
               
                 GVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTIS 
               
               
                 KAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTP 
               
               
                 PVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 86 [Amino acid sequence of hFZD2(167)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPAEPRSSDK 
               
               
                 THTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVD 
               
               
                 GVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTIS 
               
               
                 KAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTP 
               
               
                 PVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 87 [Amino acid sequence of hFZD2(168)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRAEPRSSD 
               
               
                 KTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYV 
               
               
                 DGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTI 
               
               
                 SKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTT 
               
               
                 PPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 88 [Amino acid sequence of hFZD2(169)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYAEPRSS 
               
               
                 DKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWY 
               
               
                 VDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEK 
               
               
                 TISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYK 
               
               
                 TTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 89 [Amino acid sequence of hFZD2(170)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYAAEPRS 
               
               
                 SDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNW 
               
               
                 YVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIE 
               
               
                 KTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNY 
               
               
                 KTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 90 [Amino acid sequence of hFZD2(171)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATAEPR 
               
               
                 SSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFN 
               
               
                 WYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPAS 
               
               
                 IEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENN 
               
               
                 YKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 91 [Amino acid sequence of hFZD2(172)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLAEP 
               
               
                 RSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKF 
               
               
                 NWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPA 
               
               
                 SIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPEN 
               
               
                 NYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 92 [Amino acid sequence of hFZD2(173)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEAE 
               
               
                 PRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKF 
               
               
                 NWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPA 
               
               
                 SIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPEN 
               
               
                 NYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 93 [Amino acid sequence of hFZD2(174)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHA 
               
               
                 EPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVK 
               
               
                 FNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALP 
               
               
                 ASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPE 
               
               
                 NNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSP 
               
               
                 GK 
               
               
                   
               
               
                 SEQ ID NO: 94 [Amino acid sequence of hFZD2(175)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 AEPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEV 
               
               
                 KFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKA 
               
               
                 LPASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQ 
               
               
                 PENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSL 
               
               
                 SPGK 
               
               
                   
               
               
                 SEQ ID NO: 95 [Amino acid sequence of hFZD2(178)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCAEPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED 
               
               
                 PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSN 
               
               
                 KALPASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESN 
               
               
                 GQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKS 
               
               
                 LSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 96 [Amino acid sequence of hFZD2(184)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVAEPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVV 
               
               
                 DVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEY 
               
               
                 KCAVSNKALPASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIA 
               
               
                 VEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHN 
               
               
                 HYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 97 [Amino acid sequence of hFZD2(190)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVPSYLSYAEPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPE 
               
               
                 VTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDW 
               
               
                 LNGKEYKCAVSNKALPASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKG 
               
               
                 FYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVM 
               
               
                 HEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 98 [Amino acid sequence of hFZD2(197)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVPSYLSYKFLGERDAEPRSSDKTHTCPPCPAPEAEGAPSVFLFPPKPKDTL 
               
               
                 MISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLT 
               
               
                 VLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREPQVYTLPPSRDELTKNQVS 
               
               
                 LTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGN 
               
               
                 VFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 99 [Amino acid sequence of hFZD2(210)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVPSYLSYKFLGERDCAAPCEPARPDGSAEPRSSDKTHTCPPCPAPEAEGA 
               
               
                 PSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREE 
               
               
                 QYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPREPQVYTL 
               
               
                 PPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKL 
               
               
                 TVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 100 [Amino acid sequence of hFZD2(216)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVPSYLSYKFLGERDCAAPCEPARPDGSMFFSQEAEPRSSDKTHTCPPCPA 
               
               
                 PEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNA 
               
               
                 KTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKAKGQPR 
               
               
                 EPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDG 
               
               
                 SFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
               
                   
               
               
                 SEQ ID NO: 101 [Amino acid sequence of hFZD2(222)-hFcm]: 
               
               
                 QFHGEKGISIPDHGFCQPISIPLCTDIAYNQTIMPNLLGHTNQEDAGLEVHQFYPLVKV 
               
               
                 QCSPELRFFLCSMYAPVCTVLEQAIPPCRSICERARQGCEALMNKFGFQWPERLRCEH 
               
               
                 FPRHGAEQICVGQNHSEDGAPALLTTAPPPGLQPGAGGTPGGPGGGGAPPRYATLEHP 
               
               
                 FHCPRVLKVPSYLSYKFLGERDCAAPCEPARPDGSMFFSQEETRFARAEPRSSDKTHT 
               
               
                 CPPCPAPEAEGAPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGV 
               
               
                 EVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCAVSNKALPASIEKTISKA 
               
               
                 KGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPV 
               
               
                 LDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK 
               
            
           
         
       
     
     Example 2 
     2-1. Transient Expression of hFZD2(X)-hFcm of SEQ ID NOs. 72-101 using hFZD2(X)-hFcm Recombinant Expression Vectors (X=140, 153-175, 178, 184, 190, 197, 210, 216, 222) 
     2-1-1. Preparation of Expression Vector Used for Gene Introduction 
     The hFZD2(X)-hFcm recombinant expression vectors obtained in Examples 1-1-3 and 1-1-5 were introduced into  Escherichia coli  DH5α, and DNAs were prepared from the transformants using a plasmid purification kit (Qiagen plasmid Maxi kit, QIAGEN K.K., Japan). 
     2-1-2. Introduction of Vectors into Culture Cells, Secretion and Expression 
     FreeStyle 293F cells (Invitrogen Japan K. K.) are cultured in FreeStyle 293 expression medium (Invitrogen Japan K. K.) at 37° C. in the presence of 5% CO2 at 125 rpm to reach a cell density of 2×105 to 3×106 cells/ml. When culture was conducted using 1 liter of medium, a solution comprising 35 ml of the Opti-MEM I reduced serum medium (Invitrogen Japan K. K.) added to 1 mg of the expression vector and a solution comprising 33.7 ml of the Opti-MEM I reduced serum medium added to 1.3 ml of the 293 fectin transfection reagent (Invitrogen Japan K. K.) were prepared, and the resulting solutions were incubated at room temperature for 5 minutes. These solutions were mixed with each other after incubation, and the resultant was incubated at room temperature for an additional about 25 minutes. Thereafter, the expression vector treated in the manner described above was added to a medium containing 1×10 9  cells/1 of FreeStyle 293F cells, and culture was conducted for 3 days. 
     2-1-3. Secretion Analysis of Culture Supernatant 
     To determine concentrations of fusion proteins of truncated forms of hFZD2 extracellular region protein and hFc variants by ELISA method, some of culture supernatant from Example 2-1-2 was recovered at Day 2. Test samples and a standard solution (in-house purified hFZD2(140)-hFcm recombinant) were added to a 96-well plate (Maxi Soap, Dow Corning Corporation) to which anti-human IgGs (γ-Chain Specific, available from Sigma Aldrich, Product No. I3382) were immobilized. Then, the plate was incubated at room temperature for 1 hour, and washed three times using T-PBS(−). Then, peroxidase-conjugated goat anti-human IgGs (Fc fragment) (available from Sigma Aldrich, Product No. A0170) were added thereto, and incubated at room temperature for 1 hour. 
     Then, the plate was washed four times using T-PBS(−), and color was developed using SUMILON peroxidase coloring kit (available from Sumitomo Bakelite Co., Ltd., Product No. ML-1120T). Absorbance was measured at 450 nm to determine the concentrations in the culture supernatant. 
     In this experiment, a concentration of hFZD2(140)-hFcm in the culture supernatant was 467.3±3.1 ng/mL. In contrast, concentrations of hFZD2(153)-hFcm to hFZD2(175)-hFcm in the culture supernatant were 1207.4±13.8, 1153.7±17.3, 1166.5±43.9, 1153.7±0.0, 1194.5±108.7, 1567.9±46.6, 1449.2±83.1, 1707.5±150.7, 1664.5±130.7, 1719.3±167.4, 1921.5±135.3, 1727.8±206.8, 1473.5±48.7, 1076.7±72.6, 1919.1±81.1, 2324.0±206.4, 1698.4±231.1, 1768.4±166.8, 1771.6±127.5, 1987.1±142.5, 1433.0±93.4, 1369.4±98.5, and 915.3±48.5 ng/mL, respectively. Also, concentrations of hFZD2(178)-hFcm, hFZD2(184)-hFcm, hFZD2(190)-hFcm, hFZD2(197)-hFcm, hFZD2(210)-hFcm and hFZD2(216)-hFcm in the culture supernatant were 1370.1±44.6, 258.1±58.6, 75.3±5.3, 115.6±45.2, 80.2±5.2, and 93.2±4.8 ng/mL, respectively. From these results, it was demonstrated that hFZD2(153)-hFcm to hFZD2(175)-hFcm were present at high concentrations in the culture supernatant. 
       FIG. 3  shows a graph of concentrations of hFZD2(140)-hFcm, hFZD2(153)-hFcm to hFZD2(175)-hFcm, hFZD2(178)-hFcm, hFZD2(184)-hFcm, hFZD2(190)-hFcm, hFZD2(197)-hFcm, hFZD2(210)-hFcm, and hFZD2(216)-hFcm in the culture supernatant 
     As shown in  FIG. 3 , the secretion of hFZD2-hFcm recombinants was increased by extending the extracellular region protein by 153 amino acids in length. Also, it was suggested that this improvement in secretion was maintained by 175 amino acids in length. 
     2-2. Purification and Preparation of hFZD2(X)-hFcm Recombinants 
     2-2-1. Pre-Treatment of Culture Supernatant 
     The supernatant of the culture solution obtained in Example 2-1-2 was recovered, filtered through a 0.22 μm filter (0.22 μm GP Express Membrane 500 mL, available from Millipore Corporation, Japan), and then cooled to 4° C. 
     2-2-2. Antibody Affinity Chromatography 
     An acidic buffer (pH 2.7) was prepared by dissolving 1.24 g boric acid (NACALAI TESQUE, INC., MW: 61.83), 7.16 g disodium hydrogen phosphate•12-hydrate (Wako Pure Chemical Industries, Ltd., MW: 358.14), 4.20 g citric acid•monohydrate (NACALAI TESQUE, INC., MW: 210.14) and 8.77 g sodium chloride (NACALAI TESQUE, INC., MW: 58.44) in Milli Q water and adding 15.55 mL of 1 M hydrochloric acid solution (prepared by 12 times diluting 12 N hydrochloric acid from Wako Pure Chemical Industries, Ltd. in Milli Q water), followed by making 1 L total volume using Milli Q water. 
     A neutral buffer (pH 7.3) was prepared by dissolving 1.24 g boric acid (NACALAI TESQUE, INC., MW: 61.83), 7.16 g disodium hydrogen phosphate. 12-hydrate (Wako Pure Chemical Industries, Ltd., MW: 358.14), 4.20 g citric acid•monohydrate (NACALAI TESQUE, INC., MW: 210.14) and 8.77 g sodium chloride (NACALAI TESQUE, INC., MW: 58.44) in Milli Q water and adding 11.7 mL of 5 M sodium hydroxide solution (prepared by dissolving 10 g sodium hydroxide from Wako Pure Chemical Industries, Ltd. (MW: 40.00) in Milli Q water to 50 mL total volume), followed by making 1 L total volume using Milli Q water. 
     A neutralizing buffer was prepared by dissolving 13.1 g sodium dihydrogen phosphate•dihydrate (KANTO CHEMICAL CO., LTD., MW: 156.01), 41.5 g disodium hydrogen phosphate•12-hydrate (Wako Pure Chemical Industries, Ltd., MW: 358.14) and 8.77 g sodium chloride (NACALAI TESQUE, INC., MW: 58.44) in Milli Q water such that a total volume becomes 1 L. 
     The pre-treated culture supernatant was applied to Protein A column (Hi Trap ProteinA HP 5 mL; available from GE healthcare bioscience, Co., Ltd., Japan) equilibrated using the neutral buffer (pH 7.3). Then, the column was washed using 25 mL or more of the neutral buffer (pH 7.3), followed by using 25 mL or more of a buffer prepared by adding NaCl to D-PBS(−) (NACALAI TESQUE, INC., Japan) at 1.85 M NaCl concentration. Then, the column was again washed using 25 mL of the neutral buffer (pH 7.3). 
     Then, the column was washed using 10 mL of 55% acidic buffer (pH 2.7). After washing, 70 mL of the acidic buffer (pH 2.7) was added over the column at 55% to 95% gradient to recover target proteins. The isolation and purification process was performed using AKTAexplorer10s or AKTApurifier (GE healthcare bioscience, Co., Ltd., Japan). Before use, endotoxin was removed. 
     2-2-3. Preparation of Purified Authentic Sample 
     The purified authentic sample obtained in Example 2-2-2 was concentrated using an ultrafilter membrane VIVASPIN20 10,000 MWCO PES (Sartorius Stedim Japan K. K., Japan). Thereafter, the buffer in the sample was substituted with D-PBS(−) using NAP Columns (GE Healthcare Bio-Sciences Corp, Japan). After the completion of the concentration and substitution procedure, the resultant was filtered through a 0.22 gm filter (Millex GV, Millipore, Japan). 
     Concentrations of proteins were calculated from specific absorption coefficients by measuring A 280 nm. The specific absorption coefficients were as follows: hFZD2(140)-hFcm is E1%1 cm=9.7, hFZD2(159)-hFcm is E1%1 cm=9.4, hFZD2(165)-hFcm is E1%1 cm=9.3, hFZD2(171)-hFcm is E1%1 cm=9.4, and hFZD2(175)-hFcm is E1%1 cm=9.5. 
     2-3. Analysis of Mice Administrating the Recombinant hFZD2(X)-hFcm (X=140, 159, 165, 171, 175) 
     2-3-1. Administration to Mice 
     The hFZD2(X)-hFcm recombinant was administered to mice in order to evaluate physiological effects thereof on bone tissue. Mice used in this experiment were C57B6 mice (Charles River, Japan). For administration, the recombinant hFZD2(X)-hFcm was prepared at the protein concentration of 0.1 mg/mL in PBS. The formulation was administrated to tail vein of each mouse at the dose of 10 mL/kg. Administration was performed total three times at the interval of 10 days. 
     Also, the group of mice subjected to PBS administration was used as a control group to compare osseous tissue changes. At Day 0, PBS administration was started. PBS was administrated to tail vein total three times at 10 days interval by Day 20. At Day 30, mice were subjected to necropsy. 
     2-3-2. Bone Structure Analysis (Three-Dimensional Microfocus X-Ray CT) 
     The left femur samples were obtained at necropsy, and the internal structure of the cancellous bone region of the distal femoral metaphysis was observed using a high-resolution microfocus X-ray CT scanner (micro-CT, Scan Xmate-L090, Comscantecno Co., Ltd.) and the analytic software (TRY 3D-BON, Ratoc System Engineering Co., Ltd.) in a non-invasive manner. The bone volume/tissue volume (BV/TV), the trabecular thickness (Tb. Th), the trabecular number (Tb. N), and the trabecular separation (Tb. Sp), were measured. The results are shown in Table 1. 
     
       
         
           
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                 Average of 
                   
                   
                   
               
               
                   
                 bone 
               
               
                   
                 volume/ 
                 Average of 
                 Average of 
                 Average of 
               
               
                   
                 tissue 
                 trabecular 
                 trabecular 
                 trabecular 
               
               
                 hFZD2(X)- 
                 volume 
                 thickness 
                 number 
                 separation 
               
               
                 hFcm 
                 (BV/TV, %) 
                 (Tb. Th, μm) 
                 (Tb. N, 1/mm) 
                 (Tb. Sp, μm) 
               
               
                   
               
             
            
               
                 PBS 
                 18.1 ± 2.3 
                 24.8 ± 1.9 
                 7.2 ± 0.9 
                 114.4 ± 16.0 
               
               
                 140 
                 20.2 ± 1.3 
                 25.9 ± 0.9 
                 7.8 ± 0.4 
                 102.5 ± 6.8  
               
               
                 159 
                 24.0 ± 2.7 
                 27.4 ± 1.7 
                 8.7 ± 0.5 
                 87.3 ± 7.6 
               
               
                 165 
                 22.4 ± 2.5 
                 26.8 ± 1.7 
                 8.3 ± 0.6 
                 93.5 ± 9.0 
               
               
                 171 
                 20.8 ± 2.9 
                 25.7 ± 1.9 
                 8.1 ± 0.6 
                  99.1 ± 10.4 
               
               
                 175 
                 21.3 ± 2.6 
                 26.0 ± 2.0 
                 8.1 ± 0.4 
                 95.5 ± 7.4 
               
               
                   
               
            
           
         
       
     
     As shown in Table 1, when observing the internal structure of the cancellous bone of the distal femoral metaphysis by micro CT, the bone volume/tissue volume (BV/TV) for the group administrating the recombinant hFZD2(140)-hFcm was 20.2±1.3%. In contrast, the bone volume/tissue volume for the groups administrating the recombinants hFZD2(159)-hFcm, hFZD2(165)-hFcm, hFZD2(171)-hFcm, and hFZD2(175)-hFcm was increased by 24.0±2.7, 22.4±2.5, 20.8±2.9, and 21.3±2.6%, respectively. Also, for the group administrating hFZD2(159)-hFcm and hFZD2(165)-hFcm, the trabecular thickness and the trabecular number were increased and the trabecular separation was decreased. 
     From these results, it is demonstrated that the increase of the bone volume/tissue volume, the trabecular thickness and the trabecular number and the decrease of the trabecular separation in the secondary cancellous bone of the femur metaphysis might be caused by extending the length of amino acids of the extracellular region protein of the recombinant hFZD2(140)-hFcm (Table 1). 
     All the publications, patents and patent applications cited herein are incorporated herein by reference in their entirety. 
     While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skill in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof. This application is based on the Japanese patent application (No. 2011-137279), filed on Jun. 21, 2011, the entire contents of which are incorporated hereinto by reference. 
     INDUSTRIAL APPLICABILITY 
     According to the present invention, a protein comprising a truncated form of an extracellular region protein derived from Frizzled 2 which has improved secretion activity in production cells and bone mass-increasing activity can be produced. Further, by using said protein or DNA, a pharmaceutical composition for treating bone diseases can be effectively produced. Furthermore, a method for treating bone diseases, which uses the pharmaceutical composition, can be provided. 
     SEQUENCE LISTING 
     
         
         SEQ ID NO:3—Amino acid sequence of human IgG1 Fc variant 
         SEQ ID NO:4—Nucleotide sequence of DNA encoding human IgG1 Fc variant 
         SEQ ID NOs:5 and 6—Nucleotide sequences of sense origo DNAs 
         SEQ ID NOs7 and 8:—Nucleotide sequences of primers 
         SEQ ID NO:9—Nucleotide sequence of DNA encoding fusion protein 
         SEQ ID NO:10—Amino acid sequence of fusion protein 
         SEQ ID NOs:11 to 40—Nucleotide sequences of primers 
         SEQ ID NOs:42 to 71—Nucleotide sequences of DNAs encoding fusion proteins 
         SEQ ID NOs:72 to 101—Amino acid sequences of fusion proteins