NPT3, or Solute carrier family 17, member 2, is a human gene encoded by SLC17A2. It may also be known as: Sodium-dependent phosphate transport protein 3; Sodium/phosphate cotransporter 3; Solute carrier family 17 member 2. The encoded protein has an amino acid length of 439 and a mass of 47.3 kDa. NPT3 is a member of the Major facilitator superfamily, Sodium/anion cotransporter family. Homologs of this gene exist in other organisms, including: Mouse.