D-glyceraldehyde + A + H2O => (R)-glycerate + AH2 + H(+)
d-glyceraldehyde + a + h2o => (r)-glycerate + ah2 + h(+)
D-glyceraldehyde + A + H2O => (R)-glycerate + AH2 + H(+)
d-glyceraldehyde + a + h2o => (r)-glycerate + ah2 + h(+)