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Eur J Biochem. 1993 Jul 15;215(2):229-38.

Primary structure of the human muscle acetylcholine receptor. cDNA cloning of the gamma and epsilon subunits.

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Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, England.


cDNA sequences encompassing the full coding region for the human muscle acetylcholine receptor (AChR) epsilon and gamma subunits have been isolated. The deduced amino-acid sequences indicate that the mature epsilon subunit contains 473 amino acids and is preceded by a 20-amino-acid signal peptide. As predicted from genomic clones, the gamma subunit contains 495 amino acids preceded by a 22-amino-acid signal peptide. In common with the human alpha, beta, gamma and delta subunits the epsilon subunit is highly conserved between mammalian species. The epsilon subunit gene is not closely linked to the gamma and delta subunits on chromosome 2 but rather is located with the beta subunit on chromosome 17. Expression of the alpha-, beta-, gamma-, delta- and epsilon-subunit cRNAs in rabbit-reticulocyte lysates followed by analysis on SDS/PAGE show glycosylated proteins with apparent molecular masses of 44-60 kDa.

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