This gene is a member of the glycoprotein hormone beta chain family and encodes the beta 5 subunit of chorionic gonadotropin (CG). Glycoprotein hormones are heterodimers consisting of a common alpha subunit and a unique beta subunit which confers biological specificity. CG is produced by the trophoblastic cells of the placenta and stimulates the ovaries to synthesize the steroids that are essential for the maintenance of pregnancy. The beta subunit of CG is encoded by 6 genes which are arranged in tandem and inverted pairs on chromosome 19q13.3 and contiguous with the luteinizing hormone beta subunit gene. [provided by RefSeq, Jul 2008].
Lustbader, J. W.; Birken, S; Pileggi, N. F.; Kolks, M. A.; Pollak, S; Cuff, M. E.; Yang, W; Hendrickson, W. A.; Canfield, R. E. (1989). "Crystallization and characterization of human chorionic gonadotropin in chemically deglycosylated and enzymatically desialylated states". Biochemistry. 28 (24): 9239–43. doi:10.1021/bi00450a001. PMID2611225.
Dominguez-Lopez, P; Diaz-Cueto, L; Ulloa-Aguirre, A; Lopez-Valle, M. A.; Arechavaleta-Velasco, F (2008). "No evidence of the human chorionic gonadotropin-beta gene 5 betaV79M polymorphism in Mexican women". Endocrine. 34 (1–3): 117–20. doi:10.1007/s12020-008-9103-9. PMID19002615. S2CID30505243.
Tegoni, M; Spinelli, S; Verhoeyen, M; Davis, P; Cambillau, C (1999). "Crystal structure of a ternary complex between human chorionic gonadotropin (hCG) and two Fv fragments specific for the alpha and beta-subunits". Journal of Molecular Biology. 289 (5): 1375–85. doi:10.1006/jmbi.1999.2845. PMID10373373.