bluuebunny/crossref_metadata_2025_split huggingface dataset:
Identification of molecular markers that are expressed in discrete anterior–posterior domains of the endoderm from the gastrula stage to mid‐gestation
Authors: Moore‐Scott Billie A. , Opoka Robert , Lin Suh‐Chin J. , Kordich Jennifer J. , Wells James M. 
Published: June 2007

AbstractLittle is known about how the endoderm germ layer is patterned along the anterior–posterior (A‐P) axis before the formation of a gut tube (embryonic day [e] 7.5–8.5 in mouse), largely due to a paucity of molecular markers of endoderm. In particular, there are few genes that mark posterior domains of endoderm that give rise to the midgut and hindgut. We have identified 8 molecular markers that are expressed in discrete domains of the gastrula stage endoderm (e7.5), suggesting that a significant level of pattern exists in the endoderm before the formation of a gut tube. Three genes Tmprss2, NM_029639, and Dsp are expressed in a presumptive midgut domain overlying the node, a domain for which molecular markers have not previously been identified. Two genes, Klf5 and Epha2 are expressed in posterior endoderm associated with the primitive streak. Expression of these five genes persists in the midgut and/or hindgut at e8.5, 9.5 and 10.5, suggesting that these genes are markers of these domains throughout these stages of development. We have identified three genes Slc39a8, Amot, and Dp1l1, which are expressed in the visceral endoderm at e7.5. Starting at e9.5, Dp1l1 is expressed de novo in the liver, midgut, and hindgut. Our findings suggest that presumptive midgut and hindgut domains are being established at the molecular level by the end of gastrulation, earlier than previously thought, and emphasize the importance of endoderm patterning before the formation of the fetal gut. Developmental Dynamics 236:1997–2003, 2007. © 2007 Wiley‐Liss, Inc.
Lineage‐independent mosaic expression and regulation of the Ciona multidom gene in the ancestral notochord
Authors: Oda‐Ishii Izumi , Di Gregorio Anna 
Published: June 2007

AbstractThe transcription factor Ciona Brachyury (Ci‐Bra) plays an essential role in notochord development in the ascidian Ciona intestinalis. We characterized a putative Ci‐Bra target gene, which we named Ci‐multidom, and analyzed in detail its expression pattern in normal embryos and in embryos where Ci‐Bra was misexpressed. Ci‐multidom encodes a novel protein, which contains eight CCP domains and a partial VWFA domain. We show that an EGFP‐multidom fusion protein localizes preferentially to the endoplasmic reticulum (ER), and is excluded from the nucleus. In situ hybridization experiments demonstrate that Ci‐multidom is expressed in the notochord and in the anterior neural boundary (ANB). We found that the expression in the ANB is fully recapitulated by an enhancer element located upstream of Ci‐multidom. By means of misexpression experiments, we provide evidence that Ci‐Bra controls transcription of Ci‐multidom in the notochord; however, while Ci‐Bra is homogeneously expressed throughout this structure, Ci‐multidom is transcribed at detectable levels only in a random subset of notochord cells. The number of notochord cells expressing Ci‐multidom varies among different embryos and is independent of developmental stage, lineage, and position along the anterior–posterior axis. These results suggest that despite its morphological simplicity and invariant cell‐lineage, the ancestral notochord is a mosaic of cells in which the gene cascade downstream of Brachyury is differentially modulated. Developmental Dynamics 236:1806–1819, 2007. © 2007 Wiley‐Liss, Inc.
Thiodiacetate and Oxydiacetate Cobalt Complexes: Synthesis, Structure and Stereochemical Features
Authors: Grirrane Abdessamad , Pastor Antonio , Álvarez Eleuterio , Mealli Carlo , Ienco Andrea , Rosa Patrick , Galindo Agustín 
Published: June 2007

AbstractA series of cobalt complexes containing the dianionic ligands X(CH2COO)22– (X = S, tda; or X = O, oda) is reported. The complexes [Co(tda)(bipy)(H2O)]·4H2O (2), which was characterised by X‐ray crystallography, [Co(tda)(phen)(H2O)] (3), [Co(tda){(MeO)2bipy}(H2O)]·2H2O (4) and [Co(tda)(dpp)(H2O)]·2H2O (5) are obtained by reaction of the precursor complex [Co(tda)(H2O)]n (1a) with the bidentate N‐donor ligands 2,2′‐bipyridine (bipy), o‐phenanthroline (phen), 4,4′‐dimethoxy‐2,2′‐bipyridine [(MeO)2bipy] and 2,3‐bis(2‐pyridyl)pyrazine (dpp), respectively. The reaction of 1a with di(2‐pyridyl) ketone unexpectedly displaces tda from the coordination sphere and leads to the CoIII species [Co{OC(OH)(2‐pyridyl)2}2]+[Htda]–·3H2O (6), as confirmed by an X‐ray analysis. Three new oxydiacetate complexes of cobalt are also synthesised by treating the known complex [{Co(oda)(H2O)2}·H2O]n with 4,4′‐di‐tert‐butyl‐2,2′‐bipyridine (tBu2bipy), 2,3‐bis(2‐pyridyl)pyrazine (dpp) and 4,4′‐bipyridine (4,4′‐bipy). The complexes [Co(oda)(tBu2bipy)(H2O)]·1.5H2O (7), [Co(oda)(dpp)(H2O)]·2H2O (8) and [{Co(oda)(H2O)2}2(μ‐4,4′‐bipy)]·2H2O (9) are structurally characterised (8 as a methanol solvate). Complex 9 is binuclear, in contrast to 7 and 8 (mononuclear), and magnetic susceptibility measurements down to 2 K for this complex show high‐spin non‐correlated CoII ions with a typical Curie–Weiss behaviour. The Co(oda) fragment in 7–9 adopts a planar (mer) rather than a folded (fac) conformation, the latter of which is common to all the M(tda) complexes but is only occasionally observed in the M(oda) ones. In the final section of the paper, the key geometric parameters that control the stereochemistry of the two ligands are determined from a statistical analysis based on the structurally characterised Co(oda) and Co(tda) complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Methyllead(IV) Derivatives Stabilized by DAPTSC2–: Synthesis and Structures of New Diorganolead(IV) Complexes
Authors: Casas José S. , Castellano Eduardo E. , Ellena Javier , García‐Tasende María S. , Namor Facundo , Sánchez Agustín , Sordo José , Vidarte María J. 
Published: June 2007

AbstractThe reaction of the bis(thiosemicarbazone) of dimethyl pyridine‐2,6‐diyl diketone, H2DAPTSC, with PbMe2(OAc)2, PbMePh(OAc)2 or PbPh2(OAc)2 in MeOH afforded the complexes [PbMe2(DAPTSC)], [PbMePh(DAPTSC)] or [PbPh2(DAPTSC)] (in the first two cases together with [Pb(DAPTSC)]). X‐ray crystallography of the Pb(IV) complexes showed that the metal has a pentagonal bipyramidal coordination sphere. The N3,S2‐bound DAPTSC2– anion occupied the equatorial plane and the organic groups were in the apical positions. These compounds retain the same coordination mode in DMSO solution. DAPTSC2– is also N3,S2‐bound in [Pb(DAPTSC)], a complex with a stereochemically active PbII lone pair. The reaction of PbPh2Cl2 with H2DAPTSC, also in methanol at room temperature, afforded [PbPh2(H2DAPTSC)]2[PbPh2Cl4]Cl2·6CH3OH. X‐ray crystallography of this centrosymmetric complex showed it to consist of two [PbPh2(H2DAPTSC)]2+ cations of similar structure to the neutral [PbR2(DAPTSC)] complexes, together with a trans‐octahedral [PbPh2Cl4]2– anion and two Cl– anions. This compound decomposes in DMSO solution, probably evolving to H2DAPTSC and PbPh2Cl2(DMSO)n. In order to evaluate the changes undergone by H2DAPTSC under metallation, the X‐ray structure of the free molecule was also determined.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Ethynyltolan Platinum Complexes with (Arylalkynyl)phosphane Ligands
Authors: García Ana , Lalinde Elena , Moreno M. Teresa 
Published: June 2007

AbstractThe ethynyltolan mononuclear complexes cis‐[Pt(C≡CC6H4C≡CPh)2(PPh2C≡CR)2] [R = tol (2), C6H4C≡CPh (3)], which contain (arylalkynyl)phosphane ligands, were prepared, and the X‐ray molecular structure of 2 was determined. The reaction of 2 and 3 with cis‐[Pt(C6F5)2(thf)2] (thf = tetrahydrofuran) in the appropriate molar ratio gave the dinuclear platinum derivatives cis‐[{Pt(PPh2C≡CR)2(μ‐η1:η2‐Cα,Cβ‐C≡CC6H4C≡CPh)2}Pt(C6F5)2] [R = tol (4), C6H4C≡CPh (5)] and the trinuclear derivatives [{Pt(μ‐η1:η2‐Cα,Cβ‐C≡CC6H4C≡CPh)2(μ‐1κP:2η2‐Cα,Cβ‐PPh2C≡CR)2}{Pt(C6F5)2}2][R = tol (6), C6H4C≡CPh (7)], which are stabilized by a double ethynyltolan bridging system or a mixed ethynyltolan/alkynylphosphane bridging system, respectively.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
1,3‐Dipolarophile Character of an Extremely Bulky Phosphaalkyne Mes*C≡P (Mes* = 2,4,6‐tBu3C6H2) Leading to the Formation of 1,2,4‐Diazaphospholes with Unique Hydrogen Bonding Properties
Authors: Ito Shigekazu , Miyake Hideaki , Yoshifuji Masaaki 
Published: June 2007

Abstract2‐(2,4,6‐Tri‐tert‐butylphenyl)‐1‐phosphaethyne was allowed to react with trimethylsilyldiazomethane derivatives to afford the corresponding 1,2,4‐diazaphospholes via [2+3] cycloaddition followed by H/SiMe3 migration, in spite of the steric encumbrance of the substrates. The aromatic character of 1,2,4‐diazaphosphole is indicated by the NMR spectroscopic data and the X‐ray structure analysis as well as by theoretical calculation to confirm the planar delocalized ring skeleton. The crystal structure of the obtained 1,2,4‐diazaphospholes showed remarkable hydrogen bonding character in relation to molecular aggregation due to the presence of bulky aryl groups. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Proton Affinities in Water of Maingroup‐Element Hydrides – Effects of Hydration and Methyl Substitution
Authors: Swart Marcel , Rösler Ernst , Bickelhaupt F. Matthias 
Published: June 2007

AbstractWe have computed the proton affinities in water of archetypal anionic and neutral bases across the periodic table using the generalized gradient approximation (GGA) of density functional theory (DFT) at BP86/QZ4P//BP86/TZ2P. The main purpose of this work is to provide an intrinsically consistent set of values of the 298‐K proton affinities in aqueous solution of all anionic (XHn–1–) and neutral bases (XHn) constituted by maingroup‐element hydrides of groups 14–17 and the noble gases (i.e., group 18) along the periods 1–6. Hydration has little effect on the trends in PA values, especially in the case of the neutral bases. However, in the case of the anionic bases, hydration drastically reduces the magnitude of the PA values. Finally, we have studied how proton affinities in water are affected by methyl substitution at the protophilic center.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Vanadium(IV) and Oxidovanadium(IV) and ‐(V) Complexes with Soft Thioether Coordination – Synthesis, Spectroscopic and Structural Studies
Authors: Hector Andrew L. , Levason William , Middleton Annie J. , Reid Gillian , Webster Michael 
Published: June 2007

AbstractVOCl3 reacts with the thioethers RS(CH2)2SR (R = Me, Et or iPr) and 1,4‐dithiane to form the first examples of VV thioether complexes, the highly reactive, intensely coloured [VOCl3(dithioether)] which have been characterised by 1H and 51V NMR, IR and UV/Vis spectroscopy. Combining VOCl3 with [9]aneS3 gives [VOCl3(κ2‐[9]aneS3)] which, upon treatment with SbCl5 gives [VOCl2(κ3‐[9]aneS3)][SbCl6]. Vanadium K‐edge extended X‐ray absorption fine structure (EXAFS) studies on three examples provided partial structural analyses for these very unstable compounds. Reaction of VCl4 with O(SiMe3)2 in CH2Cl2/MeCN followed by addition of RS(CH2)2SR (R = Me or Et) produced [VOCl2{RS(CH2)2SR}]. The crystal structure of [{VOCl2(MeSCH2CH2SMe)}4] reveals a unique tetrameric V4O4 core with each vanadium also coordinated to a chelating dithioether and two Cl ligands to complete the distorted octahedral geometry. Under rigorously anhydrous conditions VCl4 reacts with RS(CH2)2SR (R = Me, Et, iPr, Ph), 1,4‐dithiane or [9]aneS3 to form [VCl4(thioether)] which are assigned as six‐coordinate distorted octahedral species on the basis of their spectroscopic characterisation. In some cases trace hydrolysis of these compounds provides an alternative route to the [VOCl2(dithioether)] complexes.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Precursors for Assembly of Supramolecules Containing Quadruply Bonded Cr24+ Units: Systematic Preparation of Cr2(formamidinate)n(acetate)4–n (n = 2–4)
Authors: Cotton F. Albert , Li Zhong , Murillo Carlos A. 
Published: June 2007

AbstractFour quadruply bonded dichromium complexes with mixed‐ligand sets, Cr2(formamidinate)n(acetate)4–n (n = 2–4), were synthesized from reactions of anhydrous Cr2(O2CCH3)4 and formamidinate anions. The Cr–Cr bond lengths fall in the range for “supershort” Cr–Cr bonds as they vary from 1.8897(5) Å to 2.012(1) Å. The distance variation depends on the presence or absence of weak axial interactions. Because formamidinate ligands are less labile than acetate groups, these compounds may be useful building blocks for the construction of neutral supramolecules having dichromium units linked by polydentate dianions.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Dinuclear Nickel–Ruthenium Complexes as Functional Bio‐Inspired Models of [NiFe] Hydrogenases
Authors: Oudart Yohan , Artero Vincent , Pécaut Jacques , Lebrun Colette , Fontecave Marc 
Published: June 2007

AbstractThe front cover picture shows a bioinspired model for the active site of [NiFe] hydrogenases. Interactions between the metal centers in combination with the structural features at the active site allow these complexes to serve as suitable catalysts for H2 electroproduction. Details are discussed in the article by V. Artero, M. Foutecave et al. on p. 2613 ff.
Epoxidation of karanja (Pongamia glabra) oil catalysed by acidic ion exchange resin
Authors: Goud Vaibhav V. , Patwardhan Anand V. , Dinda Srikanta , Pradhan Narayan C. 
Published: June 2007

AbstractKaranja oil with an iodine value of 89 g/100 g was epoxidised in situ with aqueous hydrogen peroxide and acetic acid in the presence of Amberlite IR‐120 acidic ion exchange resin as catalyst. The effect of the operating variables on the oxirane oxygen content, as well as on the oxirane ring stability and the iodine value of the epoxidised karanja oil, were determined. The variables studied were stirring speed, hydrogen peroxide‐to‐ethylenic unsaturation molar ratio, acetic acid‐to‐ethylenic unsaturation molar ratio, temperature, and catalyst loading. The effects of these parameters on the conversion to the epoxidised oil were studied and the optimum conditions for the maximum oxirane content were established. The proposed kinetic model takes into consideration the two side reactions, namely, epoxy ring opening involving the formation of hydroxy acetate and hydroxyl groups, and the reaction between the peroxyacid and the epoxy group. The kinetic and adsorption constants of the rate equations were estimated by the best fit using Marquardt's algorithm. Good agreement between experimental and predicted data validates the proposed kinetic model. From the estimated kinetic constants, the apparent activation energy for the epoxidation reaction was found to be 11 kcal/mol.
New Proline–Oxazoline Ligands and Their Application in the Asymmetric Nozaki–Hiyama–Kishi Reaction
Authors: Hargaden Gráinne C. , Müller‐Bunz Helge , Guiry Patrick J. 
Published: June 2007

AbstractSixteen members of a new ligand class incorporating an oxazoline ring linked by an amide bond to a chiral protected proline unit were prepared in a high‐yielding four‐step synthesis from readily available chiral amino alcohols and N‐protected proline. The ligands were applied in the enantioselective Nozaki–Hiyama–Kishi allylation of benzaldehyde and gave enantioselectivities of up to 57 %. Diastereomeric ligand pairs were prepared to determine the role of each chiral centre in enantioselection.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Regio‐ and Stereoselective Diels–Alder Additions of Maleic Anhydride to Conjugated Triene Fatty Acid Methyl Esters
Authors: Biermann Ursula , Butte Werner , Eren Tarik , Haase Detlev , Metzger Jürgen O. 
Published: June 2007

AbstractThe thermal, solvent‐free addition of maleic anhydride to methyl calendulate (methyl 8,10‐trans,12‐cis‐octadecatrienoate) (1a) occurs with very high regio‐ and stereoselectivity at C‐8 and C‐11 of the fatty compound giving the endo‐Diels–Alder adduct 4 with retention of the cis‐configured double bond. Analogously, the Diels–Alder addition of maleic anhydride to methyl α‐eleostearate (methyl 9‐cis,11,13‐trans‐octadecatrienoate) (2a) takes place regio‐ and stereoselectively at C‐11 and C‐14 yielding the endo‐product 5 which was hydrolyzed to give the respective tricarboxylic acid 6. X‐ray diffraction analyses of compounds 4 and 6 clearly show the regio‐ and stereoselectivity of the Diels–Alder addition reactions.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Palladium(II)‐Catalyzed Isomerization of (Z)‐1,4‐Diacetoxy‐2‐Butene: Solvent Effects
Authors: Zawisza Anna Maria , Bouquillon Sandrine , Muzart Jacques 
Published: June 2007

AbstractThe isomerization of (Z)‐1,4‐diacetoxy‐2‐butene (1) catalyzed by PdCl2(MeCN)2 was studied in THF and DMF. The reaction occurs more rapidly in THF than in DMF, but in both solvents it did not proceed to complete consumption of the substrate and led to a mixture of 1, (E)‐1,4‐diacetoxy‐2‐butene (2), and 1,2‐diacetoxy‐3‐butene (3). The formation of 2 is more favored in DMF than in THF. The reactivity of 1 and the solvent effect differ strongly from those previously obtained with Pd(PPh3)4 as the catalyst. Interpretations are provided for the crucial role of the nature of both solvent and intermediates on the course of the isomerizations.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Synthesis and Emitting Properties of the Blue‐Light Fluorophores Indolizino[3,4,5‐ab]isoindole Derivatives
Authors: Shen Yong‐Miao , Grampp Guenter , Leesakul Nararak , Hu Hong‐Wen , Xu Jian‐Hua 
Published: June 2007

AbstractIndolizino[3,4,5‐ab]isoindoles 3a–3k have been synthesized by [8+2] cycloaddition reactions of the corresponding indolizines 2a–2k with benzyne in moderate yields. Cycloadditions of pyrrolo[2,1‐a]isoquinolines 4a–4c with benzyne gave the benzo[6,7]pyrrolizino[3,4,5‐ab]isoquinolines 5a–5c. Compounds 7 and 9 were similarly prepared by the reactions of 6H‐[1]benzopyrano[3,4‐a]indolizine‐6‐one (6) and 6H‐[1]benzopyrano[3′,4′:3,4]pyrrolo[2,1‐a]isoquinolin‐6‐one (8) with benzyne in 93 and 62 % yields, respectively. The electronic structures of these compounds have been calculated by the DFT method at the B3LYP/6‐31G level. Compounds 3a–3j fluoresce in the blue region (λFmax = 439–475 nm) with high quantum yields (ΦF = 0.49–0.77 in ethanol). Compounds 5a–5c and 9 are fluorescent in the green region with quantum yields of 0.44–0.77 in ethanol and compound 7 emits blue light with a quantum yield of 0.59. The electrochemical properties of these compounds have been investigated by cyclic voltammetry. Indolizino[3,4,5‐ab]isoindoles without a substituent at C‐2 (compounds 3a, 3c, 3d) or with an alkyl substituent in the framework (3i, 3k) undergo irreversible anodic oxidations and reversible cathodic reductions. Compounds 3e and 3g with an electron‐withdrawing group at C‐2, on the other hand, undergo quasi‐reversible oxidations at 1.2–1.3 V (SCE) and reversible reductions at –1.5 to –1.9 V (SCE). Therefore, compounds 3e and 3g may be promising candidates to serve as blue‐light emitters with both hole‐ and electron‐transporting ability in monolayer OLED devices, while the other indolizino[3,4,5‐ab]isoindoles (3a–3d, 3f, 3h–3i) are potential blue‐light emitters with electron‐transporting ability. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Reaction of 1,2‐Unsaturated Trifluoromethyl Ketones and Their Conversion to 1‐(Trifluoromethyl)furan Derivatives
Authors: Zhang Dehui , Yuan Chengye 
Published: June 2007

AbstractA novel synthetic approach leading to 1‐(trifluoromethyl)furan derivatives is reported. 4‐Aryl‐1,1,1‐trifluorobut‐3‐en‐2‐one was iodinated and subsequently reduced to give the corresponding alcohol. The resultant iodo compound was then subjected to coupling with phenylacetylene to furnish an (E)‐3‐aryl‐2‐(2‐phenylethynyl)‐1‐(trifluoromethyl)allyl alcohol, which could be cyclized by means of AgOTf to furnish a 2‐(trifluoromethyl)furan in fair yield. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
A New Technique for Chemical Deposition of Pt Nanoparticles and its Applications on Biosensor Design
Authors: Wang Aifang , Ye Xiaoyan , He Pingang , Fang Yuzhi 
Published: June 2007

AbstractA new glucose biosensor design based on glucose oxidase (GOD) immobilized by polypyrrole has been described in this paper. The polymerization of pyrrole was initiated by a hexachloroplatinate which itself was reduced into Pt nanoparticles and thus served as a catalyst for the H2O2 oxidation. Properties of the produced GOD modified electrode were examined and the activity of the entrapped enzyme was determined by basic application on the amperometric detection of glucose. Much better results were found comparatively with the enzyme electrode for which the enzyme was entrapped by the electrochemically polymerized polypyrrole. This kind of technique for Pt nanoparticles deposition can be generalized to many cases where polypyrrole is used.
Determination of Copper by Adsorptive Stripping Voltammetry in the Presence of Calcein Blue
Authors: Gholivand Mohammad Bagher , Sohrabi Ali , Abbasi Shahriar 
Published: June 2007

AbstractAn electrochemical adsorptive stripping approach is presented for the trace measurement of copper in some real samples. The method is based on the reduction of Cu2+ at pH 5.5 calcein blue (CB) containing solution at −250 mV (vs. Ag/AgCl), adsorption of CuCB complex on hanging mercury drop electrode (HMDE) and the voltammetric determination by further reduction to Cu+ at HMDE. Experimental optimum conditions were determined in the fundamental studies. At the experimental optimum conditions the adsorbed complex of Cu2+ and calcein blue gives a well defined cathodic stripping peak current at −0.135 V, which has been used for the determination of copper in the concentration range of 0.02 to 15 ng/mL with accumulation time of 90 s. The relative standard deviation (RSD) for the determination of 0.5 and 6.0 ng mL−1 were 2.60 and 1.94% respectively. (n=10). The method has been applied to the analysis of copper in analytical reagent grade salts and tap water, mineral water and drug samples with satisfactory results.
Direct Bioelectrocatalysis of PQQ‐Dependent Glucose Dehydrogenase
Authors: Ivnitski Dmitri , Atanassov Plamen , Apblett Christopher 
Published: June 2007

AbstractThe direct bioelectrocatalysis was demonstrated for pyrroloquinoline quinone‐dependent glucose dehydrogenase (PQQ‐dependent GDH) covalently attached to single‐walled carbon nanotubes (SWNTs). The homogeneous ink‐like SWNT suspension was used for both creating the SWNT network on the microelectrode carbon surface and for enzyme immobilization. Functionalization of the SWNT surface by forming active ester groups was found to considerably enhance SWNT solubility in water with a range from 0.1 to 1.0 mg/mL. The PQQ‐dependent GDH immobilized on the surface of the SWNTs exhibited fast heterogeneous electron transfer with a rate constant of 3.6 s−1. Moreover, the immobilized PQQ‐dependent GDH retained its enzymatic activity for glucose oxidation. A fusion of PQQ‐dependent GDH with SWNTs has a great potential for the development of low‐cost and reagentless glucose sensors and biofuel cells.