KERATIN 19
\kˈɛɹɐtˌɪn nˈa͡ɪntiːn], \kˈɛɹɐtˌɪn nˈaɪntiːn], \k_ˈɛ_ɹ_ɐ_t_ˌɪ_n n_ˈaɪ_n_t_iː_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.
By DataStellar Co., Ltd
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Snake's-head
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