Transcriptional regulator that may regulate the expression of the loline biosynthesis cluster 1, one of the 2 clusters involved in the biosynthesis of loline alkaloids, potent insecticidal agents composed of a pyrrolizidine ring system and an uncommon ether bridge linking carbons 2 and 7 (PubMed:15654104). Expression is induced in loline alkaloid-producing cultures as well as in planta (PubMed:15654104).