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Collagen is the most abundant protein in animals. This fibrous, structural protein comprises a right-handed bundle of three… Expand 1. Subcellular fractions of freshly isolated matrix-free embryonic chick tendon and sternal cartilage cells have been… Expand Abstract Protocollagen, a non-hydroxylated form of collagen, was extracted with cold 0.1 N acetic acid from embryonic tendon… Expand Abstract An affinity column procedure was devised for the purification of protocollagen proline hydroxylase, the enzyme which… Expand Cell culture studies were performed on members of a family in which two sisters, ages 9 and 12, have a similar disorder… Expand A procedure for the isolation of relatively stable preparations of highly purified protocollagen proline hydroxylase is reported… Expand Abstract 1. 1. Eight proline analogues inhibited the incorporation of [14C]proline into collagen by embryonic cartilage… Expand Previous observations indicated that the hydroxyproline in collagen is synthesized by the hydroxylation of proline which has been… Expand The activity of parotocollagen proline hydroxylase was assayed in punch biopsy specimens of human skin. The enzyme in human skin… Expand Abstract Synthetic polytripeptides with the structure (l-Pro-Gly-l-Pro)n were used to study protocollagen hydroxylase, the enzyme… Expand