Summary
Two polypeptides, OCP-I and OCP-II, specific to the organ of Corti of the guinea pig and the rat, were detected by two-dimensional polyacrylamide gel electrophoresis. They were neither present in other inner ear structures, nor in other organs tested. The two polypeptides constitute a substantial portion of the total protein of the organ of Corti. Both inner and outer layer of the organ of Corti contained approximately equal amounts of OCP-I and OCP-II. The molecular weights of OCP-I and OCP-II are 37,000 and 22,500 daltons, respectively. The corresponding pI values are 4.9 and 5.1, respectively. In addition, actin and tubulin were detected in both layers of the organ of Corti.
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Moore BW (1976) Brain-specific proteins: S-100 protein, 14-3-2 protein, and glial fibrillary protein. In: Agranoff BW, Aprison MH (eds) Adv Neurochem, vol 1. Plenum, New York, pp 137–155
Moore BW (1980) Chemistry and biology of the S-100 protein. Scand J Immunol (in press)
Thalmann R (1976) Quantitative histo- and cytochemistry of the ear. In: Smith CA, Vernon JA (eds) The handbook of auditory and vestibular research methods. Part III Biochemistry. Thomas, Springfield, IL, pp 359–419
O'Farrell PH (1975) High resolution two-dimensional electrophoresis of proteins. J Biol Chem 250:4007–4021
Laemmli UK (1970) Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature 227:680–685
Angelborg C, Engstrom H (1973) The normal organ of Corti. In: Møller AR (ed) Basic mechanisms in hearing. Academic Press, New York London, pp 125–183
Dallos P (pers commun)
Flock A, Cheung H, Wersäll J (1979) Pathological actin in vestibular hair cells of the waltzing guinea pig. In: Stahle J, Pfaltz CR (eds) Adv. Oto-Rhino-Laryng, vol 25. Karger, Basel, pp 12–16
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Supported by NIH grants NS 06575 (R.T.), NS 05270 (B.W.M.)
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Thalmann, I., Rosenthal, H.L., Moore, B.W. et al. Organ of Corti-specific polypeptides: OCP-I and OCP-II. Arch Otorhinolaryngol 226, 123–128 (1980). https://doi.org/10.1007/BF00455126
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DOI: https://doi.org/10.1007/BF00455126