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Expression levels of Orai1 and STIM1 in mesenteric arteries. Representative images and summarized data showing the expression levels of Orai1 (A and C) and STIM1 (B and C) in mesenteric arteries from young and aged rats. Protein expressions were normalized with β-tubulin. Protein levels are expressed as the relative optical density. Mean ± SEM (n = 4–5); *P < 0.05. Young (3 months old) versus aged (22 months old).
