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人们认为头孢菌素类抗生素完全是真菌的代谢产物,但最近从土壤和植物中分离出一些革蓝氏阴性菌(Lysobacter lactemgen-us和Xanthomonas lactamgena)能产生带有不常见侧链的新型头孢菌素类——Cepha-bacins(如图所示)。从中获得三种具有活性作用的特殊菌株,定名为YK-90、YK-278和YK-280。
It is thought that cephalosporin antibiotics are entirely metabolites of fungi, but recently some Lactobacillus lactemgen-us and Xanthomonas lactamgena isolated from soil and plants produce new cephalosporins with unusual side chains Class - Cepha-bacins (as shown). Three specific strains that have an active effect were obtained and named as YK-90, YK-278 and YK-280.