Listed are ELISA Kits for the detection of RSPO, an alias name of R-spondin 1. The human protein, encoded by the gene RSPO1, is 263 amino acid residues long and has a mass of 28,959 daltons. However, there are up to 3 reported isoforms. It is a member of the R-spondin family. This protein is reported to have a nuclear and secreted cellular localization, and is glycosylated. The gene is associated with Keratoderma, palmoplantar, with squamous cell carcinoma of skin and sex reversal. For this target protein, ELISA kits with the following species reactivities are available: human, mouse, and primate. This target may also be known as: R-spondin homolog, roof plate-specific spondin-1, CRISTIN3, and RSPO.