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. 2003 Oct 14;100(22):12613–12617. doi: 10.1073/pnas.1634958100

Fig. 3.

Fig. 3.

A comparison of the interactions and orientations between key active site residues and the intermediate complexes. (A) Structure of the ASADH–SMCS complex. (B) Structure of the ASADH–hemithioacetal complex. (C) Model of the acyl-enzyme intermediate, showing the likely repositioning of the oxygen after oxidation by NADP and the proposed attack by phosphate.