part of part of has part has part characteristic of inheres in has modifier trans-4-hydroxy-L-proline Hydroxyprolinemia HP:0003260 UMLS:C0268531 Hydroxyproline is an imino acid normally present in human plasma and is derived primarily from endogenous collagen turnover and the breakdown of dietary collagen. Hyperhydroxyprolinemic patients show hydroxyproline blood levels between 150 and 500 micromole per liter. Normal levels are around 10-20 micromole per liter. SNOMEDCT_US:25739007 An increased concentration of hydroxyproline in the blood. High blood hydroxyproline levels Abnormal circulating proline concentration abnormal increased amount blood