direct studies of the amino acid sequence of an escherichia coli plasmid-coded penicillinase ( penicillin amido-beta-lactamhydrolase , ec 3.5.2.6 ) are in complete agreement with results derived from the translation of the dna sequence of a related plasmid , apart from a single amino acid substitution .
C0030841
penicillinase
C0597979
beta-lactamhydrolase