SPNS2 encodes the human gene, Spinster homolog 2 (Drosophila). It may also be known as: Protein spinster homolog 2. The encoded protein has an amino acid length of 549 and a mass of 58.0 kDa. Other isoforms may exist. SPNS2 is a member of the Major facilitator superfamily, Spinster (TC 2.A.1.49) family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.