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Gonadotropin-releasing hormone
Gonadotropin-releasing hormone (GnRH), also known as follicle-stimulating hormone–releasing hormone (FSH-RH), luteinizing hormone–releasing hormone (LHRH), gonadoliberin, and luliberin in its endogenous form and as gonadorelin (INN) in its pharmaceutical form, is a releasing hormone responsible for the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary. GnRH is a tropic peptide hormone synthesized and released from GnRH neurons within the hypothalamus. The peptide belongs to gonadotropin-releasing hormone family. It constitutes the initial step in the hypothalamic–pituitary–gonadal axis.
== Structure ==
The identity of GnRH was clarified by the 1977 Nobel Laureates Roger Guillemin and Andrew V. Schally:
pyroGlu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2
As is standard for peptide representation, the sequence is given from amino terminus to carboxyl terminus; also standard is omission of the designation of chirality, with assumption that all amino acids are in their L- form. The abbreviations appearing are to standard proteinogenic amino acids, except for ''pyroGlu'', which refers to pyroglutamic acid, a derivative of glutamic acid. The ''NH2'' at the carboxyl terminus indicates that rather than terminating as a free carboxylate, it terminates as a carboxamide.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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