Members of this family probably act as chromate transporters [1,2]. Members of this family are found in both bacteria and archaebacteria. The proteins are composed of one or two copies of this region. The alignment contains two conserved motifs, FGG and PGP.

1: Cloning, nucleotide sequence, and expression of the chromate resistance determinant of Pseudomonas aeruginosa plasmid pUM505. Cervantes C, Ohtake H, Chu L, Misra TK, Silver S; J Bacteriol 1990;172:287-291. PMID:2152903

2: Nucleotide sequence and expression of a plasmid-encoded chromate resistance determinant from Alcaligenes eutrophus. Nies A, Nies DH, Silver S; J Biol Chem. 1990;265:5648-5653. PMID:2180932