O-butanoyl-L-seryl-[protein] + CoA => L-seryl-[protein] + butanoyl-CoA
o-butanoyl-l-seryl-[protein] + coa => l-seryl-[protein] + butanoyl-coa
O-butanoyl-L-seryl-[protein] + CoA => L-seryl-[protein] + butanoyl-CoA
o-butanoyl-l-seryl-[protein] + coa => l-seryl-[protein] + butanoyl-coa