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 150 million base pairs of nucleic acids (the building blocks of DNA) and represents between 4.0 and 4.5% of the total DNA in cells.
Genes
Number of genes
These 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.[4]
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)
G-banding ideogram of human chromosome 9 in resolution 850 bphs. Band length in this diagram is proportional to base-pair length. This type of ideogram is generally used in genome browsers (e.g. Ensembl, UCSC Genome Browser).
G-banding patterns of human chromosome 9 in three different resolutions (400,[11] 550[12] and 850[3]). Band length in this diagram is based on the ideograms from ISCN (2013).[13] This type of ideogram represents actual relative band length observed under a microscope at the different moments during the mitotic process.[14]
G-bands of human chromosome 9 in resolution 850 bphs[15]
^For cytogenetic banding nomenclature, see article locus.
^ abThese values (ISCN start/stop) are based on the length of bands/ideograms from the ISCN book, An International System for Human Cytogenetic Nomenclature (2013). Arbitrary unit.
^gpos: Region which is positively stained by G banding, generally AT-rich and gene poor; gneg: Region which is negatively stained by G banding, generally CG-rich and gene rich; acenCentromere. var: Variable region; stalk: Stalk.
Gilbert F, Kauff N (2001). "Disease genes and chromosomes: disease maps of the human genome. Chromosome 9". Genet Test. 5 (2): 157–74. doi:10.1089/109065701753145664. PMID11551106.
Wicking C, Berkman J, Wainwright B (1994). "Fine genetic mapping of the gene for nevoid basal cell carcinoma syndrome. Chromosome 9". Genomics. 22 (3): 505–11. doi:10.1006/geno.1994.1423. PMID8001963.
Mäkelä-Bengs P, Järvinen N, Vuopala K, Suomalainen A, Palotie A, Peltonen L (1997). "The assignment the lethal congenital contracture syndrome (LCCS) locus to chromosome 9q33-34". Am. J. Hum. Genet. 61 (suppl): A30.
Chromosome Chromosome 2 Chromosome abnormality Y chromosome X chromosome Chromosome 13 Chromosome 21 Chromosome 5 Chromosome 15 Chromosome 7 Chromosome 9 Chromosome 18 Chromosome 17 Chromosome instability Chromosome 22 Sex chromosome Chromosome 4 Circular chromosome Chromosome 1 Chromosome regions Chromosome 3 Chromosome 12 Balancer chromosome Chromosome 6 Chromosome 11 Chromosome 14 Yeast artificial chromosome B chromosome Chromosome 8 Chromosome 16 Chromosome 20 Satellite chromosome Polytene chromosome Chromosome 19 Chromosome 10 Ring chromosome 15 Y chromosome microdeletion Ring chromosome …
14 syndrome Artificial chromosome Chromosomal inversion Chromosomal translocation Ring chromosome 20 syndrome Boveri–Sutton chromosome theory Philadelphia chromosome Small supernumerary marker chromosome Chromosome territories Homologous chromosome Ring chromosome 18 Ring chromosome 22 Eukaryotic chromosome structure Chromosome 15q trisomy Ring chromosome Chromosome segregation Sex-chromosome dosage compensation Y-chromosomal Adam Human Y-chromosome DNA haplogroup Chromosome 15q partial deletion Chromosome 2q deletion Human artificial chromosome Y Chromosome Consortium The Calcutta Chromosome Sex chromosome anomalies Chromosomal rearrangement Holocentric chromosome Chromosome instability syndrome Bacterial artificial chromosome Chromosome conformation capture Chromosome engineering Chromosome 1 open reading frame 194 Chromosomal deletion syndrome Segmental duplication on the human Y chromosome Normalized chromosome value Chromosome 2q31.1 duplication syndrome gene Monocentric chromosome Chromosomal fragile site Derivative chromosome Microcell-mediated chromosome transfer List of organisms by chromosome count Chromosome X open reading frame 57 Chromosome jumping Conversion table f