…. Two specific endoplasmic reticulum calcium channels, ryanodine receptors (RyRs) and inositol 1,4,5-trisphosphate receptors (IP3Rs) play an important role in Ca2+ regulation. In the present study, we provided a 3D structure of RyR and IP3R by homology modeling, and we predicted their interactions with a known neuroprotective compound, 3-thiomethyl-5,6-(dimethoxyphenyl)-1,2,4-triazine (TDMT), as well as two inhibitors, dantrolene and 2-aminoethoxydiphenyl borate (2-APB)….