4Y68:
reference: Structural basis of lantibiotic recognition by the nisin resistance protein from Streptococcus agalactiae., Khosa S, Frieg B, Mulnaes D, Kleinschrodt D, Hoeppner A, Gohlke H, Smits SH, Sci Rep. 2016 Jan 4;6:18679. doi: 10.1038/srep18679. PMID: 26727488

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