Transcription factor involved in regulation of gene cluster that mediates the biosynthesis of aspergillic acid (PubMed:29674152). Secondary metabolite biosynthesis. Expressed during the earliest stages of maize kernel infection (PubMed:23834374). Abolishes the expression of all the 7 aspergillic acid biosynthesis cluster genes and reduces ferriaspergillin production (PubMed:29674152).