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Tamaki等设计并合成了多肽类抗生素gratisin(GR)的类似物——环(-Val-Orn-Leu-D-Phe-Pro-D-Lys-)2,这种类似物对所有革兰阳性和革兰阴性受试菌都有强大的抗菌活性,并且对铜绿假单孢菌IFO 3080的活性是短杆菌肽S(gramicidin S,GS)的2倍。
Tamaki et al. Designed and synthesized an analogue of the polypeptide antibiotic gratisin (GR), -Val-Orn-Leu-D-Phe-Pro-D-Lys- Gram-negative test bacteria have strong antibacterial activity, and the activity of Pseudomonas aeruginosa IFO 3080 is twice as large as gramicidin S (GS).