(2E)-butenoyl-CoA + L-lysyl-[protein] => N(6)-(2E)-butenoyl-L-lysyl-[protein] + CoA + H(+)
(2e)-butenoyl-coa + l-lysyl-[protein] => n(6)-(2e)-butenoyl-l-lysyl-[protein] + coa + h(+)
(2E)-butenoyl-CoA + L-lysyl-[protein] => N(6)-(2E)-butenoyl-L-lysyl-[protein] + CoA + H(+)
(2e)-butenoyl-coa + l-lysyl-[protein] => n(6)-(2e)-butenoyl-l-lysyl-[protein] + coa + h(+)