Carnitine acetyltransferase is absent from acuJ mutants of Aspergillus nidulans. 
The acuJ mutant of Aspergillus nidulans has been shown to lack carnitine acetyltransferase (CAT) activity when grown under conditions where this activity is readily detectable in wild-type strains.  Revertants selected for growth on acetate recover CAT activity and the ability to grow on long-chain fatty acids.  When growing on carbon sources such as sucrose, cytosolic acetyl coenzyme A was generated by adenosine triphosphate (ATP):citrate lyase.