1.3.1.114 3-oxocholan-24-oyl-CoA + NAD+ = 3-oxochol-4-en-24-oyl-CoA + NADH + H+ (1) - 1.3.1.114 3-oxochol-4-en-24-oyl-CoA + NAD+ = 3-oxochol-4,6-dien-24-oyl-CoA + NADH + H+ (2) - 1.3.1.114 12alpha-hydroxy-3-oxocholan-24-oyl-CoA + NAD+ = 12alpha-hydroxy-3-oxochol-4-en-24-oyl-CoA + NADH + H+ (3) - 1.3.1.114 12alpha-hydroxy-3-oxochol-4-en-24-oyl-CoA + NAD+ = 12alpha-hydroxy-3-oxochol-4,6-dien-24-oyl-CoA + NADH + H+ (4) -