obsolete 2,6-dimethyl-5-methylene-3-oxo-heptanoyl-CoA C-acetyltransferase activity (obsolete GO:0034945)
OBSOLETE. Catalysis of the reaction: 2,6-dimethyl-5-methylene-3-oxo-heptanoyl-CoA + CoASH = 3-isopropylbut-3-enoyl-CoA + propanoyl-CoA.