SIDE-CHAIN SPECIFICITY IN THE ENZYMATIC-SYNTHESIS OF PENICILLINS
- 5-Carboxynaphth-1-oyl-, 4-carboxybenxoyl-,trans-5-carboxy-3-pentenoyl- and cis-5-carboxy-3-pentenoyl-L-cysteinyl-D-valine were shown to be converted by isopenicillin N synthetase to their corresponding penicillins in yields of 90%, 12%, 40% and 5%, respectively. © 1990.
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