A protein that binds one of these compounds is engineered from a Tn10 gene product and the VP16 transactivator domain in a common inducible gene expression system. One type of these compounds forms the substrate of zinc-containing metalloenzymes that are class B in a classification scheme named for Ambler. A solution containing tryptone and yeast solution is commonly supplemented with these compounds to check for uptake (-5[1])of pUC19 or other vectors. One of these compounds prevents crosslinking (10[1])of N-acetylglucosamine and (-5[1])N-acetylmuramic (10[1])acid (10[1])and contains a characteristic four-atom ring. (-5[1])That type of these compounds, (-5[1])beta-lactams, (-5[1])disrupt the peptidoglycan (10[1])layer of the cell wall. For 10 points, penicillin (10[1])is what kind of drug that kills bacteria? (10[1])■END■ (10[3])