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Comparison of the A. niger aza cluster and the A. nidulans afo cluster and their respective products. PKS domain abbreviations: SAT, starter unit:ACP transacylase; KS, ketosynthase; AT, malonyl-CoA:ACP transacylase; PT, product template; ACP, acyl carrier protein; CMeT, C-methyltransferase; DH, dehydratase; KR, ketoreductase; ER, enoyl reductase; R, reductase. Structure of 1 is confirmed by NMR (see Table S1 and Figure S5) and MS/MS analysis (Figure S2).
