\sˈa͡ɪtə͡ʊkɹˌatɪn ˈe͡ɪtiːn], \sˈaɪtəʊkɹˌatɪn ˈeɪtiːn], \s_ˈaɪ_t_əʊ_k_ɹ_ˌa_t_ɪ_n ˈeɪ_t_iː_n]\
Definitions of CYTOKERATIN 18
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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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- an iodide that is used photography, seeding clouds to make rain, and in medicine Argenti iodidum.