Also acts on ethyl (R)-3-oxobutanoate and some other (R)-3-hydroxy acid esters. The (R)- symbol is allotted on the assumption that no substituents change the order of priority from O-3>C-2>C-4. A subunit of yeast fatty acid synthase (EC 2.3.1.86 fatty-acyl-CoA synthase). cf. EC 1.1.1.280 (S)-3-hydroxyacid ester dehydrogenase.
