The human CGB5 gene encodes chorionic gonadotropin (hCG)beta 5, which is aberrantly expressed in trophoblastic neoplasm and in some non-trophoblastic neoplasms. Fucntional studies observed that it involved tumor initiation, growth, and metastatic outgrowth. Carriage of particular variants in the promoter of the CGB5 gene seems to protect against RM. CGB5 Protein, Human, Recombinant (His) is expressed in HEK293 mammalian cells with His tag. The predicted molecular weight is 17 kDa and the accession number is P01233-1.