19 Chromosome represents more than 2% of the total DNA in cells. People normally have two copies of this chromosome as all other non-sex chromosomes. Chromosome nineteen spans about 64 million base pairs. Base Pairs are two molecules (nucleotides) on opposite DNA strands that are connected. Adenine (A) forms a base pair with thymine (T), as does guanine (G) with cytosine (C) in DNA. Base pairs is how DNA is measured. There are about 1,695 genes in this chromosome.

The finished sequence of human chromosome 19, the most gene dense of all human chromosomes, has been released by JGI and its collaborators. With an accuracy calculated at better than 99.99%, the finished code reveals 55.8 million base pairs and 1461 protein-coding genes, including genes related to such recalcitrant diseases as familial hypercholesterolemia and insulin-resistant diabetes.

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19 Chromosome To 20 Chromosome