fChromosome 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.
Gene list
The following is a partial list of genes on human chromosome 9. For a complete list, see the link in the infobox on the right.
Diseases and disorders
The following diseases are some of those related to genes on chromosome 9:
acytosiosis
ALA-D deficiency porphyria
Amyotrophic lateral sclerosis
citrullinemia
Coronary artery disease
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
References
External links
Chromosomes (human)