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In Situ Hybridization With Chymase mRNA Antisense in MR
(A to C) In situ hybridization with chymase mRNA antisense in MR atria demonstrating chymase mRNA in endothelial cells (EC) lining a blood vessel and interstitial cells (most likely fibroblasts [FB]) and cells with granules consistent with mast cells (MC). There is a limited amount of chymase mRNA in myocytes. (D) Sense control.
