نتایج جستجو برای: Ryanodine receptor
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1.1 Size and Evolution The ryanodine receptor (RyR) is a selective Ca release channel that is localized to the endoplasmic reticulum (ER) in both excitable and non-excitable cells. The RyR owes its name to the plant alkaloid and high affinity ligand ryanodine. The functional RyR exists as a tetramer composed of a single unit of approximately 565kDa. To date, it is the largest known ion channel....
The family of ryanodine receptor (RyR) genes encodes three highly related Ca2+ release channels: RyR1, RyR2 and RyR3. Until about 10 years ago, RyRs were essentially known only for being the Ca2+ release channels of the sarcoplasmic reticulum of striated muscles, because of the high levels of expression of the RyR1 and RyR2 isoforms in skeletal and cardiac muscles, respectively. In contrast wit...
signal activates specialized Ca 2 1 release channels, the ryanodine receptors (RyRs), in the sarcoplasmic reticulum (SR). This process is called Ca 2 1 -induced Ca 2 1 release (CICR). Intuitively, the CICR process should be self-regenerating because the Ca 2 1 released from the SR should feedback and activate further SR Ca 2 1 release. However, the CICR process is precisely controlled in the he...
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