ID 2.8.3.9 DE butyrate--acetoacetate CoA-transferase. CA acetoacetate + butanoyl-CoA = acetoacetyl-CoA + butanoate. CC -!- Butanoate, acetoacetate and their CoA thioesters are the preferred CC substrates, but the enzyme also acts, more slowly, on the derivatives CC of a number of C2 to C6 monocarboxylic acids. DR P33752, CTFA_CLOAB ; P23673, CTFB_CLOAB ; //