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Expression of atrial genes in Hrt2 mutant mouse embryos. In situ hybridization of E17.5 hearts showing the ectopic expression of Mlc1a, Mlc2a, Sln, ANF, and Tbx5 in ventricles of Hrt2CKO mice (Right) compared with control mice (Left). Arrows depict ectopic expression in the ventricle.
