Inositol triphosphate receptor

From Freepedia

Inositol triphosphate receptor (IP3R) is a membrane glycoprotein complex acting as Ca2+ channel activated by inositol triphosphate (IP3). It has a broad tissue distribution but is especially abundant in the cerebellum. Most of the IP3R's are found in the cell at the surface of the endoplasmic reticulum. The IP3R complex is formed of four 313 kDa subunits.

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