This family consists of several bacterial Na+/H+ antiporter B (NhaB) proteins. The exact function of this family is unknown [1,2].

1: Topological study of Vibrio alginolyticus NhaB Na+/H+ antiporter using gene fusions in Escherichia coli cells. Enomoto H, Unemoto T, Nishibuchi M, Padan E, Nakamura T; Biochim Biophys Acta 1998;1370:77-86. PMID:9518558

2: Roles of NhaA, NhaB, and NhaD Na+/H+ antiporters in survival of Vibrio cholerae in a saline environment. Herz K, Vimont S, Padan E, Berche P; J Bacteriol 2003;185:1236-1244. PMID:12562793