Chromosome 9
Chromosome 9 is one of the 23 pairs of chromosomes in humans. Humans normally have two copies of this chromosome, as they normally do with all chromosomes. Chromosome 9 spans about 138 million base pairs of nucleic acids (the building blocks of DNA) and represents between 4 and 4.5 percent of the total DNA in cells.

# Genes

## Number of genes
The following are some of the gene count estimates of human chromosome 9. Because researchers use different approaches to genome annotation their predictions of the number of genes on each chromosome varies (for technical details, see gene prediction). Among various projects, the collaborative consensus coding sequence project (CCDS) takes an extremely conservative strategy. So CCDS's gene number prediction represents a lower bound on the total number of human protein-coding genes.

## Gene list
The following is a partial list of genes on human chromosome 9. For complete list, see the link in the infobox on the right.
- ABO: ABO histo-blood group glycosyltransferases
- ACTL7A: encoding protein Actin-like protein 7A
- ADAMTS13: ADAM metallopeptidase with thrombospondin type 1 motif, 13
- AIF1L: allograft inflammatory factor 1-like
- ALAD: aminolevulinate, delta-, dehydratase
- ALS4: amyotrophic lateral sclerosis 4
- ANGPTL2: angiopoietin-related protein 2
- ASS: argininosuccinate synthetase
- BNC2: zinc finger protein basonuclin-2
- C9orf64: chromosome 9 open reading frame 64
- C9orf78: encoding protein Uncharacterized protein C9orf78
- C9orf84: chromosome 9 open reading frame 84
- C9orf135: encoding protein Chromosome 9 open reading frame 135
- C9orf152: chromosome 9 open reading frame 152
- CAAP1: caspase activity and apoptosis inhibitor 1
- CARD19: caspase recruitment domain family member 19
- CBWD1: COBW domain-containing protein 1
- CCDC180: Coiled coil domain-containing protein 180
- CCL21: chemokine (C-C motif) ligand 21, SCYA21
- CCL27: chemokine (C-C motif) ligand 27, SCYA27
- CFAP157: Cilia and flagella associated protein 157
- CHMP5: Charged multivesicular body protein 5
- CNTLN: centlein
- COL5A1: collagen, type V, alpha 1
- DDX31: DEAD box polypeptide 31
- DENND1A: DENN domain-containing protein 1A
- ENG: endoglin (Osler-Rendu-Weber syndrome 1)
- ENTPD2: encoding enzyme ectonucleoside triphosphate diphosphohydrolase 2
- EQTN: equatorin
- FAM73B: family with sequence similarity 73 member B
- FAM120A: Family with sequence similarity 120 member A
- FAM122a: encoding protein Family with sequence similarity 122A
- FBP1 Fructose-1,6-bisphosphatase 1
- FIBCD1: encoding protein Fibrinogen C domain containing 1
- FOCAD: focadhesin
- FXN: frataxin
- GALT: galactose-1-phosphate uridylyltransferase
- GAS1: growth arrest-specific protein 1
- GCNT1: glucosaminyl (N-acetyl) transferase 1
- GLE1L: Nucleoporin GLE1
- GPR107: G protein-coupled receptor 107
- GRHPR: glyoxylate redasductase/hydroxypyruvate reductase
- HAUS6: HAUS augmin-like complex subunit 6
- IFN1@: Interferon, type 1, cluster
- IKBKAP: inhibitor of kappa light polypeptide gene enhancer in B-cells, kinase complex-associated protein
- INSL6: insulin like 6
- ISCA1: iron-sulfur cluster assembly 1 homolog, mitochondrial
- KIAA1958: protein KIAA1958
- KYAT1: Kynurenine aminotransferase 1
- LINGO2: leucine rich repeat and Ig domain containing 2
- MGC50722: Protein MGC50722, Uncharacterized Protein LOC399693
- MIR181A2HG encoding protein MIR181A2 host gene
- MIR7-1: microRNA 7-1
- MSMP: encoding protein Microseminoprotein, prostate associated
- MTAP: S-methyl-5'-thioadenosine phosphorylase
- NAA35: encoding protein N(alpha)-acetyltransferase 35, NatC auxiliary subunit
- NANS: N-acetylneuraminate synthase
- NINJ1: ninjurin-1
- NOL6: nucleolar protein 6
- NUDT2: nudix hydrolase 2
- OLFM1: olfactomedin 1
- PHF2: PHD finger protein 2
- PHPT1: phosphohistidine phosphatase 1
- PIP5K1B: phosphatidylinositol-4-phosphate 5-kinase type-1 beta
- PLAA: phospholipase A-2-activating protein
- PMPCA: mitochondrial processing alpha subunit
- PRUNE2: protein prune homolog 2
- RABGAP1: RAB GTPase activating protein 1
- REXO4: RNA exonuclease 4
- RNF183: encoding protein Ring finger protein 183
- SARDH: sarcosine dehydrogenase, mitochondrial
- SIT1: signaling threshold regulating transmembrane adapter 1
- SLC25A25-AS1: encoding protein SLC25A25 antisense RNA 1
- SPAG8 sperm-associated antigen 8
- SPIN1: spindlin-1
- ST6GALNAC4 encoding enzyme ST6 (alpha-N-acetyl-neuraminyl-2,3-beta-galactosyl-1,3)-N-acetylgalactosaminide alpha-2,6-sialyltransferase 4, also known as sialyltransferase 3C (SIAT3-C) or sialyltransferase 7D (SIAT7-D)
- ST6GALNAC6: ST6 N-acetylgalactosaminide alpha-2,6-sialyltransferase 6
- STOML2: stomatin-like protein 2
- STRBP: spermatid perinuclear RNA-binding protein
- TEX10: testis expressed 10
- TGFBR1: transforming growth factor beta, receptor type I
- TMC1: transmembrane channel-like 1
- TMEM215: encoding protein Transmembrane protein 215
- TMEM268: Transmembrane protein 268
- TOR2A encoding protein Torsin-2A
- TSC1: tuberous sclerosis complex]] 1
- TTC39B: tetratricopeptide repeat protein 39B
- UBAC1: ubiquitin-associated domain containing protein 1
- UBAP1: ubiquitin-associated protein 1
- UBAP2: ubiquitin-associated protein 2
- ZBTB43: zinc finger and BTB domain containing 43
- ZCCHC6: zinc finger, CCHC domain containing 6
- ZDHHC21: zinc finger DHHC-type containing 21
- ZNF79: zinc finger protein 79
- ZNF510: zinc finger protein 510

# Diseases and disorders
The following diseases are some of those related to genes on chromosome 9:
- acytosiosis
- ALA-D deficiency porphyria
- citrullinemia
- chronic myelogenous leukemia (t9;22 - the Philadelphia chromosome)
- Diaphyseal Medullary Stenosis with Malignant Fibrous Histiosytoma (DMS-MFH, Hardcastle Syndrome)
- Ehlers-Danlos syndrome
- familial dysautonomia
- Friedreich ataxia
- galactosemia
- Gorlin syndrome or nevoid basal cell carcinoma syndrome
- hereditary hemorrhagic telangiectasia
- lethal congenital contracture syndrome
- nail-patella syndrome (NPS)
- nonsyndromic deafness
- OCD
- polycythemia vera
- porphyria
- primary hyperoxaluria
- Tangier's disease
- tetrasomy 9p
- thrombotic thrombocytopenic purpura
- trisomy 9
- tuberous sclerosis
- VLDLR-associated cerebellar hypoplasia

# Cytogenetic band