“…54 The Perspective by Yokoyama, Li, and Pang describes heroic studies by the Yokoyama lab, and others, to dissect a complex transformation by MoaA, an RS enzyme, and a partner protein, MoaC, during the biosynthesis of molybdopterin. 55 Molybdopterin is an essential redox cofactor used in molybdenumcontaining enzymes. The inability to synthesize the cofactor in humans results in several potentially fatal diseases.…”