kinin - définition. Qu'est-ce que kinin
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Qu'est-ce (qui) est kinin - définition

CLASS OF PEPTIDES
Kinin (protein)

kinin         
['k??n?n]
¦ noun
1. Biochemistry a substance, such as bradykinin, produced in response to injury and causing vasodilation and smooth muscle contraction.
2. Botany a compound that promotes cell division and inhibits ageing in plants.
Origin
1950s: from Gk kinein 'to move' + -in1.
Kinin         
A kinin is any of various structurally related polypeptides, such as bradykinin and kallidin. They are members of the autacoid family.
Kininogen         
  • Blood clotting cascade. The blood clotting cascade consists of the intrinsic and extrinsic pathway, both of which create thrombin, a protease involved in blood clotting. The intrinsic pathway requires kininogen, specifically high molecular weight kininogen, as a cofactor.
  • Protein structure of bradykinin. Bradykinin is a nine amino acid-long polypeptide made by the cleavage of high-molecular-weight kininogen at D4. It acts as an inflammatory mediator.
CLASS OF PROTEINS
Kininogens; Kinin precursor
Kininogens are precursor proteins for kinins, biologically active polypeptides involved in blood coagulation, vasodilation, smooth muscle contraction, inflammatory regulation, and the regulation of the cardiovascular and renal systems.

Wikipédia

Kinin

A kinin is any of various structurally related polypeptides, such as bradykinin and kallidin. They are members of the autacoid family. Kinins are peptides that are cleaved from kininogens by the process of kallikreins. Kallikreins activate kinins when stimulated.

It is a component of the kinin-kallikrein system.

Their precursors are kininogens. Kininogens contain a 9-11 amino acid bradykinin sequence.

In botany, the plant hormones known as cytokinins were first called kinins, but the name was changed to avoid confusion.