Probable transcription factor which modulates gene expression, thereby acting as an ASJ sensory neuron terminal selector gene. Expressed in ASJ sensory neurons, pharyngeal cells, rectal cells, intestine, seam cells, and vulval cells. RNAi-mediated knockdown abolishes expression of sulfotransferase ssu-1 and thioredoxin trx-1 in the ASJ sensory neurons, in adults, embryos and larvae. Belongs to the Sp1 C2H2-type zinc-finger protein family.