In concert with FKH1, plays a role in directionality of mating type switching by controlling which donor mating-type locus is inserted into MAT locus during mating type switching. Interacts with FKH1. Leads to a defect in donor preference during mating-type switching (PubMed:27257873). Does not affect FKH1's overlapping role with FKH2 of regulation of the expression of the CLB2 cluster of genes during the G2/M phase of the mitotic cell cycle (PubMed:27257873). Present with 2120 molecules/cell in log phase SD medium.