Peptide antibiotics are widespread in nature.Most of them have antibacterial or antifungi activity.Moreover, some of them have antiparasite, antiviral or antitumoral activity.

• 多肽抗生素是生物界中广泛存在的一类生物活性小肽，一般具有抗细菌或真菌的作用，有些还具有抗原虫、病毒或癌细胞的功能。