NCIt definition : The potassium salt form of penicillin G, a broad-spectrum penicillin antibiotic. Penicillin
G potassium binds to penicillin binding proteins (PBP), the enzymes that catalyze
the synthesis of peptidoglycan, which is a critical component of the bacterial cell
wall. This leads to the interruption of cell wall synthesis, consequently leading
to bacterial cell growth inhibition and cell lysis.;