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Structures of the lantibiotics subtilin, produced by B. subtilin ATCC 6633; nisin A, produced by several L. lactis strains; and gallidermin, produced by Staphylococcus gallinarum. The amino acids of nisin and the first 12 N-terminal amino acids of gallidermin that differ from those in subtilin are highlighted in gray. Abbreviations: A-S-A, meso-lanthionine; Abu-S-A, 3-methyl-lanthionine; Abu, α-aminobutyric acid; Dha, 2,3-didehydroalanine; Dhb, 2,3-didehydroburyrine.
