candidate: In enzymology , a holo - [ acyl - carrier - protein ] synthase ( ) is an enzyme that catalyzes the chemical reaction:CoA - [ 4' - phosphopantetheine ] + apo-acyl carrier protein formula_1 adenosine 3' , 5' - bisphosphate + holo - acyl carrier proteinThis enzyme belongs to the family of transferases , specifically those transferring non-standard substituted phosphate groups .