sodium ion transmembrane transporter activity sodium:proton antiporter activity https://github.com/geneontology/go-ontology/issues/26941 https://github.com/geneontology/go-ontology/issues/30193 GO:0015385 Reactome:R-HSA-5661086 Reactome:R-HSA-425994 Reactome:R-HSA-425965 pH-dependent sodium:proton antiporter activity pH-dependent sodium:hydrogen antiporter activity molecular_function RHEA:29251 MetaCyc:TRANS-RXN-129 sodium:hydrogen exchange activity sodium:hydrogen exchanger sodium/hydrogen antiporter activity Reactome:R-HSA-2872463 Reactome:R-HSA-2889070 Reactome:R-HSA-426015 Reactome:R-HSA-425983 Reactome:R-HSA-2872444 Reactome:R-HSA-5661039 GO:0015502 Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Na+(out) + H+(in) = Na+(in) + H+(out). sodium:hydrogen antiporter activity metal cation:proton antiporter activity