A number of ELISA Kits are available that target R-spondin1, an alias of the protein, R-spondin 1. The human protein, encoded by the gene RSPO1, is a member of the R-spondin family. The protein's cellular localization is indicated to be nuclear and secreted. Additional synonyms or past names for this protein may include: CRISTIN3, RSPO. Homology is conserved in other species, such as Mouse, Rat, Zebrafish, Frog, Chicken.