Author:
Gigli I,von Zabern I,Porter R R
Abstract
The fourth component of complement, C4, was isolated from human serum in good yield, and in confirmation of previous reports was shown to be formed from three peptide chains, alpha, beta and gamma, with apparent mol.wts. 90 000, 80 000 and 30 000 respectively. Preparative methods are described for the isolation of the three peptide chains and their amino acid analyses reported. Component C4 contains 7.0% carbohydrate, alpha-chain 8.6% and the beta-chain 5.6%. The N-terminal amino acid sequences are given for 12 residues of the alpha-chain, eight of the beta-chain and 19 of the gamma-chain.
Subject
Cell Biology,Molecular Biology,Biochemistry
Cited by
113 articles.
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