Abstract
Three screening methods were used to isolate GL-7-ACA acylase-producing strains. Three positive isolates were identified with Pseudomonas nitroreducens CCRC 11041 possessing the highest activity, against GL-7-ACA and GL-7-ADCA. No activity was detected when Ceph C or succinyl-7-ACA was used as substrate; glutaric acid was found to be inhibitory. CCRC 11041 could produce maximal GL-7-ACA acylase activity when cultivated on meat extract medium II. The enzyme had a pH optimum of 5.0 and a temperature optimum of 42°C.
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