Reconstitution of CazE and CazF activity in vitro. (A) HPLC analysis (280 nm) of α-pyrones biosynthesized by CazF in the presence of (i) malonyl-CoA and (ii) malonyl-CoA and SAM. (B) HPLC analysis (360 nm) of chaetoviridins enzymatically synthesized in vitro when (i) CazF was incubated with 8, malonyl-CoA, NADPH and SAM; (ii) CazE was incubated with 8, malonyl-CoA, NADPH and SAM; (iii) CazE and CazF were incubated with malonyl-CoA; (iv) CazE and CazF were incubated with malonyl-CoA and SAM; (v) CazE and CazF were incubated with malonyl-CoA and NADPH; (vi) CazE and CazF were incubated with malonyl-CoA, NADPH and SAM.