Fig. 3: Functional verification of the oxepinase OpaB.

a HPLC analysis of the conversion of 3 to 4 in the opaB expression strain of A. nidulans at 254 nm. b A sequence logo for the conserved EXXR motif in OpaB using sequences of 96 P450 enzymes (Supplementary Table 9). c Proposed mechanism for oxepin formation catalyzed by OpaB (SH: substrate).