Ryanodine receptors are a type of calcium release channel found primarily in muscle cells, playing a crucial role in muscle contraction. These receptors are located on the sarcoplasmic reticulum and allow calcium ions to flow into the cytoplasm when activated, which is essential for the process of excitation-contraction coupling in both skeletal and cardiac muscle tissues. They interact closely with other proteins to ensure efficient muscle function and are integral to understanding how muscles contract and relax.
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