Sodium/ascorbate cotransporter (PubMed:10471399, PubMed:10556521). Mediates electrogenic uptake of vitamin C, with a stoichiometry of 2 Na(+) for each ascorbate (PubMed:10471399). L-ascorbate(out) + 2 Na(+)(out) = L-ascorbate(in) + 2 Na(+)(in) Ubiquitous. Phosphorylated. Belongs to the nucleobase:cation symporter-2 (NCS2) (TC 2.A.40) family.