Compound as reactive (5)

NADP⁺ + (2S)-ethylmalonyl-CoA ← crotonyl-CoA + NADPH + CO₂

an oxidized electron donor + butanoyl-CoA ← crotonyl-CoA + a reduced electron donor

butanoyl-CoA + NADP⁺ ← crotonyl-CoA + NADPH + H⁺

2 a reduced ferredoxin [iron-sulfur] cluster + 2 NAD⁺ + butanoyl-CoA ← 2 an oxidized ferredoxin [iron-sulfur] cluster + 2 NADH + crotonyl-CoA

coenzyme A + H₂O + crotonyl-CoA → 2 H⁺ + 2 acetyl-CoA

Compound as product (6)

H⁺ + Na⁺ + (E)-glutaconyl-CoA → crotonyl-CoA + Na⁺ + CO₂

glutaryl-CoA → 2 H⁺ + crotonyl-CoA + CO₂

4-hydroxybutanoyl-CoA → H₂O + crotonyl-CoA

(S)-3-aminobutanoyl-CoA → crotonyl-CoA + ammonium

crotonate + acetyl-CoA → acetate + crotonyl-CoA

oxygen + butanoyl-CoA → hydrogen peroxide + crotonyl-CoA

Reversible reaction (8)

2 H⁺ + FAD + glutaryl-CoA ↔ FADH₂ + crotonyl-CoA + CO₂

(3R)-3-hydroxybutanoyl-CoA ↔ H₂O + crotonyl-CoA

(S)-3-hydroxybutanoyl-CoA ↔ H₂O + crotonyl-CoA

H⁺ + (E)-glutaconyl-CoA ↔ crotonyl-CoA + CO₂

an oxidized electron donor + glutaryl-CoA ↔ crotonyl-CoA + a reduced electron donor + CO₂

vinylacetyl-CoA ↔ crotonyl-CoA

FAD + butanoyl-CoA + H⁺ ↔ FADH₂ + crotonyl-CoA

butanoyl-CoA + NAD⁺ ↔ crotonyl-CoA + NADH + H⁺