ENDO C CYTOKERATIN
\ˈɛndə͡ʊ sˈiː sˈa͡ɪtə͡ʊkɹˌatɪn], \ˈɛndəʊ sˈiː sˈaɪtəʊkɹˌatɪn], \ˈɛ_n_d_əʊ s_ˈiː s_ˈaɪ_t_əʊ_k_ɹ_ˌa_t_ɪ_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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Dopamine Acetyltransferase
- An enzyme that catalyzes the of groups from acetyl-CoA to arylamines. They have wide specificity for aromatic amines, particularly serotonin, and can also catalyze acetyl transfer between arylamines without CoA. EC 2.3.1.5.