And that essentially leads to the breakdown of the nervous system and that leads to death of that particular individual. Now, what about penicillin? So nerve gas kills off that individual, but penicillin actually saves that individual because, for example, if an individual has an infection by some type of bacterial agent, if we add penicillin into that individual, what penicillin does is it binds until special enzyme found in that bacterial cell that essentially is used by the bacterial cell to form the bacterial cell wall. So that enzyme is known as transpeptidase. So transpeptidase is an enzyme used by the bacterial cell to form the wall, the cell wall around that bacterial cell. And penicillin binds onto transpeptidase and prevents it in, activates it, inhibits it, and prevents it from making that cell wall.