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Immunohistochemistry of ryanodine receptor 2 (RyR2) expression in transverse sections of the heart + lungs of rats without arrhythmia. Expression of RyR2 in the (A) LV, (B) RV, (C) LAA and (D) LPV. Scale bar, 20 µm. (E) Masson's trichrome-stained transverse section of the whole heart, boxes represent the locations of A, B, C and D. Scale bar, 5,000 µm. LV, left ventricle; RV, right ventricle; LAA, left atrial appendage; LPV, left pulmonary vein.
