[Term]
id: PR:000003262
name: collagen alpha chain
def: "A protein that is a component of collagen. Collagens are trimeric molecules in which each chain comprises a repeating Gly-X-Y triplet, in which X and Y can be any residue but are usually proline and hydroxyproline, respectively. This results in a left-handed helix that combines with other two to form a triple-helical structure." [PMID:15788652, PMID:1639194, Pfam:PF01391]
comment: Category=family.
is_a: PR:000000001 ! protein