it was found that benzylpenicillin in amounts of 50 , 100 and 300 mg , ampicillin in an amount of 25 mg , methicillin in an amount of 12 mg and tetracycline in an amount of 2.5 mg as calculated per 1 mg of trypsin had no effect in vitro on the esterase activity of the enzyme .
C0030827
benzylpenicillin
C0002680
ampicillin