Transcription factor that specifically controls transcription of the zearalenone biosynthesis cluster genes (PubMed:16262793). Conditions for carbon-, nitrogen-, or phosphorus-starvations lead to very low expression (PubMed:16262793). Increase in pH results in gradual reduction of the gene expression (PubMed:16262793). Impairs the expression of the zearalenone biosynthesis cluster genes and results in the loss of beta-zearalenonol and zearalenone production (PubMed:16262793). Belongs to the bZIP family.