Subunit of a Na+/H+ Prokaryotic antiporter complex ([1],[2]).

1: A putative multisubunit Na+/H+ antiporter from Staphylococcus aureus. Hiramatsu T, Kodama K, Kuroda T, Mizushima T, Tsuchiya T; J Bacteriol 1998;180:6642-6648. PMID:9852009

2: The pha gene cluster of Rhizobium meliloti involved in pH adaptation and symbiosis encodes a novel type of K+ efflux system. Putnoky P, Kereszt A, Nakamura T, Endre G, Grosskopf E, Kiss P, Kondorosi A; Mol Microbiol 1998;28:1091-1101. PMID:9680201