Fig. (4) Tolerance of GAPDHS assay to DMSO. DMSO was tested in the GAPDHS HTS assay (30 nM GAPDHS, 50 mM glycine, 50 mM potassium phosphate, pH 8.9, 5 mM EDTA, 1 mM DTT, 1% DMSO, 0.5 mM NAD and 0.5 mM GAP) at the indicated concentrations of DMSO.