the d-alanine carboxypeptidase was inhibited by several beta-lactam antibiotics and the 50 % inhibitory levels were 10 ( -8 ) m penicillin g , 10 ( -8 ) m ampicillin , 10 ( -5 ) m cloxacillin , and 5 x 10 ( -7 ) m methicillin .
C0030842
penicillin
C0025643
methicillin