GI

GI or Gi may refer to:

Art and culture

Biology

Computing and technology

Places

Sport

Nór

Nór (Old Norse Nórr) or Nori is firstly a mercantile title and secondly a Norse man's name. It is stated in Norse sources that Nór was the founder of Norway, from whom the land supposedly got its name. (The name in fact probably derives from ‘nórðrvegr’, ‘northern way’.)

Chronicon Lethrens'

The Chronicle of Lejre (“Chronicon Lethrense”) written about 1170 introduces a primeval King Ypper of Uppsala whose three sons were Dan who afterwards ruled Denmark, Nori who afterwards ruled Norway, and Østen who afterwards ruled the Swedes. But the account then speaks only of the descendants of Dan.

Icelandic accounts

Source material

Parallel but not quite identical accounts of Nór the eponym of Norway appear in “Fundinn Nóregr” (‘Norway Found’), hereafter called F, which begins the Orkneyinga saga, and in Hversu Noregr byggðist (‘How Norway was Settled’), hereafter called B, both found in the Flatey Book.

About Thorri

King Thorri (Þorri 'frozen snow'), king of Finland, Kvenland and Götaland in B, was son of Snær ('Snow') the Old, a descendant of Fornjót (ruler of Finland and Kvenland in F). See Snær and Fornjót for further information. The name Þorri has long been identified with that of Þórr, the name of the Norse thunder god Thor, or thunder personified.

Gi alpha subunit

G_i alpha subunit (G_αi, or G_i/G₀ or G_i protein) is a heterotrimeric G protein subunit that inhibits the production of cAMP from ATP. A mnemonic for remembering this subunit is to look at first letter (G_αi = Adenylate Cyclase inhibitor).

Receptors

The following G protein-coupled receptors couple to the G_i subunit:

Function

G_i mainly inhibits the cAMP dependent pathway by inhibiting adenylate cyclase activity, decreasing the production of cAMP from ATP, which, in turn, results in decreased activity of cAMP-dependent protein kinase. Therefore, the ultimate effect of G_i is the opposite of cAMP-dependent protein kinase.