part of voltage-gated calcium channel complex sarcoplasmic reticulum membrane endoplasmic reticulum protein-containing complex ryanodine receptor complex 2014-07-24T09:36:41Z A voltage-gated calcium-release channel complex of the sarcoplasmic or endoplasmic reticulum. It plays an important role in the excitation-contraction (E-C) coupling of muscle cells. RyR comprises a family of ryanodine receptors, widely expressed throughout the animal kingdom. cellular_component anm RyR An example of this is RyR1 in rabbit (P11716) in PMID:2550460 (inferred from electron microscopy). GO:1990425