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Anal Biochem. 1989 Mar;177(2):318-22.

Amino acid analysis: determination of cysteine plus half-cystine in proteins after hydrochloric acid hydrolysis with a disulfide compound as additive.

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1
Institute of Biochemical Genetics, University of Copenhagen, Denmark.

Abstract

All cysteine and cystine in a protein are derivatized during hydrolysis in hydrochloric acid containing 3,3'-dithiodipropionic acid. The resulting derivative can be separated from other amino acids and used for quantitation of cysteine plus half-cystine. A procedure is presented for accurate determination by ion exchange chromatography and postcolumn derivatization of all amino acids from acid hydrolysis of a protein, including the Cys-derivative.

PMID:
2729552
[Indexed for MEDLINE]
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