. . . . "2-oxobutanoate + NAD+ + coenzyme A → propanoyl-CoA + CO2 + NADH"^^ . "2-oxobutanoate + NAD⁺ + coenzyme A → propanoyl-CoA + CO₂ + NADH"^^ . . . . . . . . . . . . . "2-oxobutanoate + NAD+ + coenzyme A → propanoyl-CoA + CO2 + NADH"^^ .