Provided below are ELISA kits targeting paired like homeobox 2B, a human protein encoded by PHOX2B. This protein is 314 amino acids long, with a mass of 31.6 kDa, and is a member of the Paired homeobox family. This is reported to be a nuclear protein. There is a noted implication in Congenital central hypoventilation syndrome. Other alias names for this protein include: paired mesoderm homeobox protein 2B, PHOX2B homeodomain protein, neuroblastoma Phox, neuroblastoma paired-type homeobox protein, CCHS, NBLST2, and NBPhox.