NCIt definition : The disodium salt form of carbenicillin, a broad-spectrum, semi-synthetic penicillin
antibiotic with bactericidal and beta-lactamase resistant activity. Carbenicillin
acylates the penicillin-sensitive transpeptidase C-terminal domain by opening the
lactam ring. This inactivation prevents the cross-linkage of peptidoglycan strands,
thereby inhibiting the third and last stage of bacterial cell wall synthesis. This
leads to incomplete bacterial cell wall synthesis and eventually causes cell lysis.;