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Synonyms
duodenum, , Duodenum
General information
The first, shortest and widest part of small intestine, it is about 25 cm in length; extending from the pylorus to the junction with the jejunum at the level of the first or second lumbar vertebra on the left side; it is divided into the superior part, the first part of which is the duodenal cap, the descending part, into which the bile and pancreatic ducts open, the horizontal part and the ascending part, terminating at the duodenojejunal junction
Positive GIP cells contained large round, or sometimes irregular, electron-dense, secretory granules, many of these possessed the characteristic dense centralcores, surrounded by a lighter matrix. On the basis of the characteristic appearance of the granules, the cells were identified as K cells. [2]
TfR2 is a key regulatory molecule that interacts functionally with Hemochromatosis Gene Product in a specialized pathway controlling iron absorption in mammals. The localization and molecular interactions of endogenous Hemochromatosis Gene Product and TfR2 proteins was examined in human and murine intestinal tissue and cells. [3]