Butanoyl-CoA+FAD<=>Crotonoyl-CoA+FADH2 (Drosophila melanogaster)
butanoyl-coa+fad<=>crotonoyl-coa+fadh2 (drosophila melanogaster)
Butanoyl-CoA+FAD<=>Crotonoyl-CoA+FADH2 (Drosophila melanogaster)
butanoyl-coa+fad<=>crotonoyl-coa+fadh2 (drosophila melanogaster)