NCIt definition : Collagen Genes encode different forms of Collagen, the principle fibrous protein of
connective tissue, all consisting of triple helix alpha-polypeptide chains. Collagen
is differentiated from other fibrous proteins by its content of proline, hydroxyproline,
and hydroxylysine; by its absence of tryptophan; and by its high content of polar
groups. Hydroxyproline residues likely promote the triple helical fibrous structure
of collagen. (NCI);
Semantic type(s)