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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Conjugation of synthetic peptides to proteins: quantitation from S-carboxymethylcysteine released upon acid hydrolysis.

A method described here for conjugating synthetic peptides to carrier proteins provides a convenient method for determining peptide-to-carrier protein ratios. N-Bromoacetyl-containing peptides are reacted in situ with carrier proteins in which the disulfide bonds were reduced with tri-n-butylphosphine. At pH 7-8 and ambient temperature, the newly formed sulfhydryl groups of the carrier protein react exclusively with the bromoacetyl mokiety of the peptide to form conjugates having stable thio ether linkages. Acid hydrolyses of these conjugates release S-carboxymethylcysteine in amounts proportional to the amounts of peptides conjugated and thus allow determination of peptide-to-protein ratios.[1]

References

  1. Conjugation of synthetic peptides to proteins: quantitation from S-carboxymethylcysteine released upon acid hydrolysis. Kolodny, N., Robey, F.A. Anal. Biochem. (1990) [Pubmed]
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