Now the next question is how exactly does penicillin act on these peptidoglycan cell walls? Well before we answer that question, let's discuss the structure of peptiglycan and then let's discuss how the bacterial cells actually build this peptiglycan cell wall. So if we examine this specific strain of bacterial cells, this is the type of peptaglycan structure that we're going to see. So basically peptaglycan means we have a peptide component and we have a glycogen component. And so these purple molecules are sugar molecules and they basically line up to form a linear polysaccharide chain. And we have one chain, we have two chain, a third chain, a fourth chain and so forth.