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BGCs for deimino-antipain and related NPs. (A) Structures of peptide aldehyde protease inhibitors with the variable side chains shown in red. (B) S. albulus NRRL B-3066 BGC for deimino-antipain. A, adenylation. C, condensation. PCP, peptide carrier protein/thiolation. R, reduction. (C) Proposed proteins involved in biosynthesis of C-terminal aldehyde and capreomycidine ring of antipain-like NPs.
