CYTOKERATIN 17
\sˈa͡ɪtə͡ʊkɹˌatɪn sˈɛvəntˌiːn], \sˈaɪtəʊkɹˌatɪn sˈɛvəntˌiːn], \s_ˈaɪ_t_əʊ_k_ɹ_ˌa_t_ɪ_n s_ˈɛ_v_ə_n_t_ˌiː_n]\
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A class of fibrous proteins or scleroproteins important both as structural proteins and as keys to the study of protein conformation. The family represents the principal constituent of epidermis, hair, nails, horny tissues, and the organic matrix of tooth enamel. Two major conformational groups have been characterized, alpha-keratin, whose peptide backbone forms an alpha-helix, and beta-keratin, whose backbone forms a zigzag or pleated sheet structure.
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Procollagen Proline Dioxygenase
- mixed-function oxygenase that catalyzes hydroxylation prolyl-glycyl-containing-peptide, usually in protocollagen, hydroxyprolylglycyl-peptide. The enzyme utilizes molecular oxygen with a concomitant oxidative decarboxylation of 2-oxoglutarate to succinate. EC 1.14.11.2.