title: Further studies on the cyclization of the unnatural tripeptide delta-(D-alpha-aminoadipyl)-L-cysteinyl-D-valine to penicillin N.
mesh_terms: D002511:Cephalosporins / Q000096:biosynthesis; D003500:Cyclization; D009842:Oligopeptides / Q000378:metabolism*; D010406:Penicillins / Q000096:biosynthesis*; D013302:Streptomyces / Q000378:metabolism
chemical_list: D002511:Cephalosporins; D009842:Oligopeptides; D010406:Penicillins; C011638:5-(2-aminoadipyl)cysteinylvaline; C025578:deacetoxycephalosporin C; C006414:penicillin N