Sodium/ascorbate cotransporter. Mediates electrogenic uptake of vitamin C, with a stoichiometry of 2 Na(+) for each ascorbate. L-ascorbate(out) + 2 Na(+)(out) = L-ascorbate(in) + 2 Na(+)(in) Expressed in metabolically active and specialized tissues, including high expression in brain and adrenals. Detected in a wide range of tissues. Expression in kidney is almost undetectable. Phosphorylated. Elevated expression levels in the adrenals of diabetic mice. Belongs to the nucleobase:cation symporter-2 (NCS2) (TC 2.A.40) family.