Ready-to-use ELISA kits are available for the detection of CD316, an alias of the protein, immunoglobulin superfamily member 8. The official gene symbol is IGSF8. The protein, with a mass of 65 kDa and length of 613 residues, is reported to be membrane-associated. It may be known by other names, including: EWI-2, CD81P3, prostaglandin regulatory-like protein, keratinocytes-associated transmembrane protein 4, glu-Trp-Ile EWI motif-containing protein 2, and CD81 partner 3, and KCT-4.