a 2-oxocarboxylate + AH2 => a (2R)-2-hydroxycarboxylate + A
a 2-oxocarboxylate + ah2 => a (2r)-2-hydroxycarboxylate + a
a 2-oxocarboxylate + AH2 => a (2R)-2-hydroxycarboxylate + A
a 2-oxocarboxylate + ah2 => a (2r)-2-hydroxycarboxylate + a