Abdel Malak CA, Lavrenova GI, Lysogorskaya EN, Stepanov VM. Synthesis of tetrapeptide p-nitroanilides catalyzed by pepsin.
INTERNATIONAL JOURNAL OF PEPTIDE AND PROTEIN RESEARCH 1993;
41:97-101. [PMID:
8458695 DOI:
10.1111/j.1399-3011.1993.tb00119.x]
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Abstract
Swine pepsin at pH 5 efficiently catalyzes a condensation between Z-Ala-Ala-Phe-OH and p-nitroanilides of Leu, Phe, Val, Ala and Arg that leads to formation of corresponding benzyloxycarbonyl-tetrapeptide p-nitroanilides with yields of 70-90%. These reactions are complicated by co-precipitation of pepsin and the reaction products that necessitates the use of a relatively high concentration of pepsin.
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