Acts as a DIDS-sensitive anion exchanger mediating chloride, sulfate and oxalate transport. May fulfill critical anion exchange functions in male germ line during meiosis and hence may play a role in spermatogenesis. May be involved in a new regulatory pathway linking sulfate transport to RhoGTPase signaling in male germ cells. A critical component of the sperm annulus that is essential for correct sperm tail differentiation and motility and hence male fertility (By similarity). Interacts with RACGAP1. Located at the annulus ring structure within the sperm cell. N-glycosylated. Belongs to the SLC26A/SulP transporter (TC 2.A.53) family.