The acyl radical of proline.

Prolyl dipeptidase, an enzyme cleaving l-prolyl-amino acid bonds in dipeptides containing N-terminal prolyl residues.

Synonyms: iminodipeptidase, prolinase, prolylglycine dipeptidase.

Prolyl hydroxylase, an enzyme that catalyses the hydroxylation of certain prolyl residues in collagen precursors using molecular oxygen, ferrous ion, ascorbic acid, and alpha-keotglutarate; a vitamin C deficiency directly affects the activity of this enzyme; one form of this enzyme (prolyl 4-hydroxylase) synthesises 4-hydroxyprolyl residues while another produces 3-hydroxyprolyl residues.

(05 Mar 2000)