This family includes PHO-4 from Neurospora crassa which is a is a Na(+)-phosphate symporter [1]. This family also contains the leukaemia virus receptor Swiss:Q08344.

1: Repressible cation-phosphate symporters in Neurospora crassa. Versaw WK, Metzenberg RL; Proc Natl Acad Sci U S A 1995;92:3884-3887. PMID:7732001