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Luteinizing hormone subunit beta also known as lutropin subunit beta or LHβ is a polypeptide that in association with an alpha subunit common to all gonadotropin hormones forms the reproductive signaling molecule luteinizing hormone. In humans it is encoded by the LHBgene.[4][5]
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Gonadotropins | Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH)
The luteinizing hormone beta subunit is encoded by a single gene in all mammals. In primates, this gene is located within a cluster that arose through gene duplication, and also includes multiple redundant genes encoding the beta subunit of chorionic gonadotropin as well as several nonfunctional pseudogenes. In humans these are contiguous on chromosome 19q13.3.[5] In equids the beta subunit polypeptides of luteinizing hormone and chorionic gonadotropin are identical in sequence, differing only in their carbohydrate side-chains, and are the product of a single gene.[6]
Weisshaar G, Hiyama J, Renwick AG, Nimtz M (1991). "NMR investigations of the N-linked oligosaccharides at individual glycosylation sites of human lutropin". Eur. J. Biochem. 195 (1): 257–68. doi:10.1111/j.1432-1033.1991.tb15702.x. PMID1991473.
Jameson JL, Lindell CM, Habener JF (1986). "Evolution of different transcriptional start sites in the human luteinizing hormone and chorionic gonadotropin beta-subunit genes". DNA. 5 (3): 227–34. doi:10.1089/dna.1986.5.227. PMID2424697.
Shome B, Parlow AF (1973). "The primary structure of the hormone-specific, beta subunit of human pituitary luteinizing hormone (hLH)". J. Clin. Endocrinol. Metab. 36 (3): 618–21. doi:10.1210/jcem-36-3-618. PMID4685398.
Beitins IZ, Axelrod L, Ostrea T, et al. (1981). "Hypogonadism in a male with an immunologically active, biologically inactive luteinizing hormone: characterization of the abnormal hormone". J. Clin. Endocrinol. Metab. 52 (6): 1143–9. doi:10.1210/jcem-52-6-1143. PMID6785294.
Keutmann HT, Rubin DA (1993). "A subunit interaction site in human luteinizing hormone: identification by photoaffinity cross-linking". Endocrinology. 132 (3): 1305–12. doi:10.1210/endo.132.3.7679977. PMID7679977.
Roy AC, Liao WX, Chen Y, et al. (1997). "Identification of seven novel mutations in LH beta-subunit gene by SSCP". Mol. Cell. Biochem. 165 (2): 151–3. doi:10.1007/bf00229477. PMID8979264. S2CID37938552.