title: Biosynthesis of penicillins and cephalosporins in cell-free systems.
mesh_terms: D000164:Acremonium / Q000378:metabolism; D002511:Cephalosporins / Q000096:biosynthesis*; D010406:Penicillins / Q000096:biosynthesis*; D010408:Penicillium chrysogenum / Q000378:metabolism; D013302:Streptomyces / Q000378:metabolism
chemical_list: D002511:Cephalosporins; D010406:Penicillins