Butanoyl-CoA+FAD<=>Crotonoyl-CoA+FADH2 (Xenopus tropicalis)
butanoyl-coa+fad<=>crotonoyl-coa+fadh2 (xenopus tropicalis)
Butanoyl-CoA+FAD<=>Crotonoyl-CoA+FADH2 (Xenopus tropicalis)
butanoyl-coa+fad<=>crotonoyl-coa+fadh2 (xenopus tropicalis)