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| Ryanodine Receptor Calcium Release Channel Calcium-Ryanodine Receptor Complex | RyR1 | Ryanodine Receptors | Ca Release Channel-Ryanodine Receptor | Receptor, Ryanodine | RyR2 | RyR3 | Ryanodine Receptor | Ca Release Channel Ryanodine Receptor | Calcium Ryanodine Receptor Complex Protein complexes that mediate the release of calcium from the sarcoplasmic reticulum in both skeletal and cardiac muscle cells by forming tetrametric complexes. These complexes each then act as a calcium channel. There are three isoforms of the RyR: RyR1, RyR2, and RyR3. RyR1 is specifically expressed in skeletal muscles and RyR2 in cardiac muscles. RyR3 is yet another isoform found in non-muscle cells such as neuronal cells. (From Yonsei Med J 1996;37(1):72-80) |