Presented below are ELISA kits for measuring OSP, another term for Claudin 11. Other names may also include: OSP; oligodendrocyte transmembrane protein. In humans this protein is encoded by the gene, CLDN11. It has a reported sequence size of 207 amino acids and a mass of 22 kilodaltons. It has been designated as a membrane protein and a member of the Claudin family. Orthologs have been observed in other species, including: Mouse, Rat, Fly.