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  • Title: Proteolytic degradation routes for turkey beta 1-adrenoceptor probed with antipeptide antibodies against the N-terminal sequence of the receptor.
    Author: Dunkel FG, Münch G, Boege F, Cantrill R, Kurstjens NP.
    Journal: Biochem Biophys Res Commun; 1989 Nov 30; 165(1):264-70. PubMed ID: 2556137.
    Abstract:
    Anti-peptide antibodies, raised against the N-terminal sequence (amino acids 2-10) of the turkey beta 1-adrenoceptor [Yarden et al., Proc. Natl. Acad. Sci. USA (1986) 83, 6795-6799] recognized the 50 kDa- but not the 40 kDa-form of the receptor, thus confirming the previous assumption that the N-terminus of the 50 kDa form is lost during its conversion to the 40 kDa-form [Jür beta, R., Hekman, M. & Helmreich, E.J.M. (1985) Biochemistry 24, 3349-3354]. By in situ proteolysis small amounts of receptor fragments were formed, which could be recognized by the N-terminus specific antibody. Therefore, although the production of the stable 40 kDa receptor species by proteolytic removal of a portion of the N-terminal appears to be the predominant route, there exists an additional pathway of degradation which must involve the initial cleavage of the carboxyl terminal.
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