The smallest of the human chromosomes, 21 makes up about 1.5 % of the human genome. Chromosome 21 contains nearly 300 genes and 47 million base pairs. Down syndrome, also known as trisomy 21, is the disease most commonly associated with chromosome 21. Alzheimer's disease, Jervell and Lange-Nielsen syndrome and amyotrophic lateral sclerosis are also associated with chromosome 21. Translocations are found to occur between chromosome 21 and 8, and chromosome 21 and 12, in certain leukemias. C21orf59, also known as C21orf48, is a 290 amino acid protein and its gene product has been provisionally designated C21orf59 pending further characterization.
Synonyms: C21orf48, C21orf59, Chromosome 21 open reading frame 59, CU059_HUMAN, FLJ20467, FLJ37137, FLJ40247, Uncharacterized protein C21orf59.