Reaction catalyzed by vitamin D3 24-hydroxylase (1.14.15.16)
+
2
reduced adrenodoxin
+
2
+
=
+
2
+
H2O
3-epi-1alpha,23,25-trihydroxyvitamin D3
+
2 reduced adrenodoxin
+
2 H+
+
O2
=
3-epi-1alpha,25-dihydroxy-23-oxovitamin D3
+
2 oxidized adrenodoxin
+
H2O
