Transcription factor which binds to the 5'-CCATACATTA-3' motif found in the promoter region of pgp-12 and activates its expression in the excretory cell. Expressed at low levels in excretory cell, pharynx, vulva, and posterior neurons in adults (PubMed:16159881). Strongly expressed in the excretory cell and more weakly in the pharynx in larva (PubMed:16159881). Embryonic expression in the excretory cell (PubMed:16159881). Expressed in embryo, larva and adult.