type I hair keratin fragment [Homo sapiens]/[Ovis aries]/[Rattus norvegicus]

产品描述
The human type I hair keratin subfamily comprises nine individual members, which can be subdivided into three groups. Group A (hHa1, hHa3-I, hHa3-II, hHa4) and B (hHa7, hHa8) each contains structurally related hair keratins, whereas group C members hHa2, hHa5, and hHa6 represent structurally rather unrelated hair keratins1.Keratins are divided into type I (acidic) and type II (basic to neutral) members, which form the 10-nm intermediate filament cytoskeletal network of epithelial cells through obligatory association of equimolar amounts of type I and type II keratins2,3,4.The various type I hair keratin antibodies proved to be highly specific in that they recognized only single protein bands when analyzed in Western blots of one dimensionally resolved human hair keratins. One exception concerned the hHa2 antibody, which besides the prominent hHa2 protein band also reacted with a slightly larger minor band1. . A LEF-1 consensus sequence is invariably located at a highly conserved position in the proximal promoter region of the members of the human type I hair keratin family but it is specifically lacking in the entire promoter of the hHa7 gene5.Figure1. Structure of hair keratinRef:1. L. Langbein, M. A. Rogers et al. The Catalog of Human Hair Keratins. The journal of biological chemistry. 274: 19874–19884, 19992.Steinert, P. M., and Roop, D. R. (1988) Annu. Rev. Biochem. 57, 593–625.3.Fuchs, E., and Weber, K. (1994) Annu. Rev. Biochem. 63, 345–382.4.Mischke, D. (1998) in Intermediate Filaments: Subcellular Biochemistry (Herrmann, H., and Harris, J. R., eds) Vol. 31, pp. 71–95, Plenum Press, New York.5.Rogers, M. A., Winter, H., Wolf, C., Jacobs, M., and Schweizer, J. (1998)J. Biol. Chem. 273, 26683–26691.

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