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A gene coding for an extracellular Zn-carboxypeptidase of Thermoactinomyces vulgaris has been cloned and sequenced (EMBL X56901). This enzyme named carboxypeptidase T reveals simultaneously both types of substrate specificity characteristic of mammalian carboxypeptidases A and B. The carboxypeptidase T gene is primarily expressed in E. coli as a non-active preproenzyme with an additional 98 amino...