Cephradine was synthesized by γ-alumina-immobilized form of the penicillin G acylase of Bacillus megaterium with D-phenyglycine methylester hydrochloride (CH DGME·HC1) as acy1 donor and 7-aminodeacetoxycephalosporanic acid (7-ADCA) as acy1 acceptor.0.1g of 7-ADCA was dissolved by adding 2.5 ml of dishhed warer and about 0.25 ml of 2 mol / L NaOH in a 25 m1 flask. To the solution, after 0.25g of CHDGME·HC1 was added, 0.1 mol / L Phosphate-0.05 mol / L citric acid buffer,PH 7.5 was added to result in a volume...