dna sequence analysis of the structural gene for bacillus licheniformis penicillinase has revealed a tetrapeptide sequence of leu-ala-gly-cys within the nh2-terminal part of the precursor form of penicillinase ( penicillin amido-beta-lactamhydrolase , ec 3.5.2.6 ) .
C0030841
penicillinase
C0597979
beta-lactamhydrolase