Acremonium chrysogenum	catalyzes both reaction of EC 1.14.20.1 and of EC 1.14.11.26	659322, 660843, 661796, 661974	
Acremonium chrysogenum	enzyme catalyzes both reaction of EC 1.14.20.1 and of EC 1.14.11.26	660936	
Acremonium chrysogenum	formerly Cephalosporium acremonium, gene cefEF	725639	
Acremonium chrysogenum	recombinant enzyme, catalyzes both reaction of EC 1.14.20.1 and of EC 1.14.11.26	440375	
Acremonium chrysogenum CGMCC3.3795	formerly Cephalosporium acremonium, gene cefEF	725639	
Actinomyces sp.	-	700004	
Amycolatopsis lactamdurans	-	660772	
Streptomyces clavuligerus	-	671324, 671443, 699366, 744105	
Streptomyces clavuligerus	also has slight activity of EC 1.14.20.1, ring expansion reaction of penicillin N	662088	
Streptomyces clavuligerus	gene cefF	725639