Where does the penicillin acctask the bacteria?

PBP (its complicated. Bacteria have a cell wall for protection. The building blocks of this wall are peptidoglycan (pg). Pg is arranged in 2 ways to make 2 types of bacteria: gram (+) or gram (-). Penicillin (pcn) only works in gram (+) bacteria. Pg must be cross-linked to protect the bacteria. Pcn attaches to pbp's (penicillin binding proteins) which prevents pg cross-linking. Some bacteria have pbp's resistant to pcn.