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Schematic representation of enzymatic domains in A) nonribosomal peptide synthetases (NRPS); B) polyketide synthases (PKS) and C) the typical organisation of a ribosomal biosynthetic gene cluster. Abbreviations: C: Condensation domain; A: Adenylation domain; PCP: Peptidyl carrier protein; MT: Methyltransferase; E: Epimerase; AT: Acyltransferase; ACP: Acyl carrier protein; KS: Ketosynthase; KR: Ketoreductase; DH: Dehydratase; ER: Enoyl reductase; TE: Thioesterase.
