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Human chorionic gonadotropin (hCG) is a placental hormone that stimulates secretion of the pregnancy-sustaining steroid progesterone. hCG is a member of a family of glycoprotein hormones including pituitary hormones lutropin (luteinizing hormone;LH), follitropin (follicle-stimulating hormone; FSH) and thyrotropin (thyroid-stimulating hormone; TSH). Members of this family are all composed of disulfide-rich heterodimers with two dissimilar subunits namely alpha- and beta-subunits. The alpha subunit is common to all the members of the family within a given species. The beta subunits are distinct in each of the horomones and confer the receptor and biological specificity.
anterior pituitary glycoprotein hormones common subunit alpha; CGA; CG-alpha; CGB; CGB3; CGB5; CGB7; CGB8; CG-beta; Choriogonadotropin alpha chain; choriogonadotropin subunit beta; Choriogonadotropin subunit beta 3; chorionic gonadotrophin chain beta; chorionic gonadotrophin subunit alpha; chorionic gonadotropin beta 3 subunit; chorionic gonadotropin beta 5 subunit; chorionic gonadotropin beta 8 subunit; chorionic gonadotropin beta chain; chorionic gonadotropin beta subunit; chorionic gonadotropin beta subunit 3; chorionic gonadotropin beta subunit 5; chorionic gonadotropin beta subunit 8; chorionic gonadotropin chain beta; chorionic gonadotropin human; chorionic gonadotropin, alpha polypeptide; chorionic gonadotropin, beta polypeptide; chorionic gonadotropin, beta polypeptide 5; chorionic gonadotropin, beta polypeptide 8; follicle-stimulating hormone alpha chain; follicle-stimulating hormone alpha subunit; follitropin alpha chain; FSHA; FSH-alpha; Glycoprotein hormones alpha chain; glycoprotein hormones, alpha polypeptide; GPHa; GPHA1; HCG; hCGB; human chorionic gonadotropin; LHA; LSH-alpha; luteinizing hormone alpha chain; Lutropin alpha chain; thyroid-stimulating hormone alpha chain; Thyrotropin alpha chain; TSHA; TSH-alpha
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