Cysteine: A potential source of error in
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Michael L.G. Gardner
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Article
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1984
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Elsevier Science
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English
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Hydrolysis of proteins and peptides with mercaptoethane sulfonic acid is liable to produce overestimation of the proline content owing to the production of ninhydrin-positive material (probably cysteine) which coelutes with proline on many ion-exchange analytical systems. A similar error occurs with