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Structures of the lantibiotics nisin A and lacticin 481, the phosphonate antibiotic fosfomycin, and the phosphinate phosphinothricin. Lanthionine (Lan) residues in the lantibiotics are shown in red and methyllanthionine (MeLan) residues in blue. The two methyl groups in fosfomycin and phosphinothricin that are considered to be derived from methylcobalamin are highlighted in green.
