releasing factors

releasing factors
1. factors elaborated in one structure (such as the hypothalamus) that effect the release of hormones from another structure (such as the adenohypophysis). The term is applied to substances of unknown chemical structure; those of established chemical identity are called releasing hormones (see under hormone). 2. two soluble proteins (RF-1 and RF-2) involved in the release of the completed polypeptide chain from the ribosome when a termination codon is encountered during protein synthesis (see translation). RF-1 recognizes the termination codon UAA or UAG and RF-2 recognizes UAA or UGA.

Medical dictionary. 2011.

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  • releasing factor — ● releasing factor nom masculin (mots anglais) Hormone de l hypothalamus de nature polypeptidique, dont l action s exerce sur la sécrétion d une stimuline du lobe antérieur de l hypophyse. (Abréviation : R.F. ; ) [Il existe autant de releasing… …   Encyclopédie Universelle

  • Releasing hormone — A releasing hormone or releasing factor is a hormone whose main purpose is to control the release of another hormone. The main releasing hormones secreted by the hypothalamus are:*Thyrotropin releasing hormone (TRH), *Corticotropin releasing… …   Wikipedia

  • releasing hormones — hormones elaborated in one structure that cause the release of hormones from another structure, such as those from the hypothalamus that act on the adenohypophysis. The term is applied to substances of established chemical identity, whereas… …   Medical dictionary

  • Releasing Hormone — Re|lea|sing Hor|mone, Re|lea|sing Hor|mon [rɪ li:zɪŋ hɔ̃:məʊn; engl. release = freilassen, befreien, auslösen u. hormone = Hormon], das; s, s bzw. s, e; Syn.: Liberine, Releasing Factor, Releasing Faktor, Freisetzungsfaktor: Sammelbez. für ↑… …   Universal-Lexikon

  • Releasing-Hormon — Re|lea|sing Hor|mone, Re|lea|sing Hor|mon [rɪ li:zɪŋ hɔ̃:məʊn; engl. release = freilassen, befreien, auslösen u. hormone = Hormon], das; s, s bzw. s, e; Syn.: Liberine, Releasing Factor, Releasing Faktor, Freisetzungsfaktor: Sammelbez. für ↑… …   Universal-Lexikon

  • Corticotropin-releasing hormone — PDB rendering based on 1go9 …   Wikipedia

  • factor — 1. One of the contributing causes in any action. 2. One of the components that by multiplication makes up a number or expression. 3. SYN: gene. 4. A vitamin or other essential element. 5. An event, characteristic, or other definable entity that …   Medical dictionary

  • HYPOTHALAMUS — Malgré ses dimensions restreintes (quelques centimètres cubes chez l’homme), l’hypothalamus s’est peu à peu révélé comme le centre majeur des régulations homéostasiques. En tant que tel, il jouera donc un rôle fondamental dans tous les grands… …   Encyclopédie Universelle

  • hormone — hormonal, hormonic /hawr mon ik, moh nik/, adj. /hawr mohn/, n. 1. Biochem. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues… …   Universalium

  • Neuroendocrinology — is the study of the extensive interactions between the nervous system and the endocrine system, including the biological features of the cells that participate, and how they functionally communicate. Neuroendocrinology arose from the recognition… …   Wikipedia

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