a 2,3-saturated acyl-CoA + FAD + H(+) <=> a (2E)-enoyl-CoA + FADH2
a 2,3-saturated acyl-coa + fad + h(+) <=> a (2e)-enoyl-coa + fadh2
a 2,3-saturated acyl-CoA + FAD + H(+) <=> a (2E)-enoyl-CoA + FADH2
a 2,3-saturated acyl-coa + fad + h(+) <=> a (2e)-enoyl-coa + fadh2