4.2.1.164 Characterization of SpnQ from the spinosyn biosynthetic pathway of Saccharopolyspora spinosa: Mechanistic and evolutionary implications for C-3 deoxygenation in deoxysugar biosynthesis Saccharopolyspora spinosa 4.2.1.164 In vitro characterization of the enzymes involved in TDP-D-forosamine biosynthesis in the spinosyn pathway of Saccharopolyspora spinosa Saccharopolyspora spinosa