Ready-to-use ELISA kits are available for the detection of PVRL4, an alias of the protein, nectin cell adhesion molecule 4. The official gene symbol is NECTIN4. The protein, with a mass of 55.5 kDa and length of 510 residues, is reported to be membrane-associated and secreted. It is a member of the Nectin family and may be known by other names, including: nectin-4, PVRL4, EDSS1, poliovirus receptor-related protein 4, poliovirus receptor-related 4, and Ig superfamily receptor LNIR.