1.1.1.332 FgaOx3Pr3 an old yellow enzyme (OYE), does not convert chanoclavine-I aldehyde to its shunt products in the absence of FgaFS. Instead, it increases significantly the product yields of several SDRs for the conversion of chanoclavine-I to its aldehyde. Kinetic studies prove that overcoming the product inhibition is responsible for the observed enhancement. Bifunctionality of OYE and synergistic effect with SDRs 763533