Reaction catalyzed by 4-phospho-D-erythronate 3-dehydrogenase (1.1.1.409)
+
NAD+
=
+
NADH
+
4-phospho-D-erythronate
+
NAD+
=
3-dehydro-4-phospho-L-threonate
+
NADH
+
H+
