Ready-to-use ELISA kits are available for the detection of GPR177, an alias of the protein, Wnt ligand secretion mediator. The official gene symbol is WLS. The protein, with a mass of 62.3 kDa and length of 541 residues, is reported to be membrane-associated. It is a member of the Wntless family and may be known by other names, including: wntless Wnt ligand secretion mediator, putative NFkB activating protein 373, protein evenness interrupted homolog, integral membrane protein GPR177, G protein-coupled receptor 177, and protein wntless homolog, and EVI.