Extended Data Fig. 1: HPLC analysis of DMP oxidation reactions of 6a and 6b.

6a, 6b accumulated in ΔakaM mutant strain were probably derived from the reduction of 5a and 5b, by an endogenous reductase. DMP oxidation of 6a, 6b were carried out to obtain corresponding aldehyde products 5a and 5b. DMP: Dess–Martin periodinane.