Berg C M, Rossi J J, Coleman J V, Conlon M
J Bacteriol. 1975 Mar;121(3):1216-8. doi: 10.1128/jb.121.3.1216-1218.1975.
Mutants defective in uptake or utilization of a given metabolite can readily be obtained from facultative auxotrophs (for that metabolite) by penicillin enrichment under nonpermissive conditions in the presence of a low level of the required metabolite.
在低水平所需代谢物存在的非许可条件下,通过青霉素富集,可轻松从(针对该代谢物的)兼性营养缺陷型菌株中获得在摄取或利用特定代谢物方面存在缺陷的突变体。