Presented below are ELISA kits for measuring SPH, another term for Surfactant associated 3. Other names may also include: NANCI; surfactant associated protein H. In humans this protein is encoded by the gene, SFTA3. It has a reported sequence size of 94 amino acids and a mass of 10.5 kilodaltons. Orthologs have been observed in other species, including: Fly.