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Cardiac FGFR4 expression in Col4a3KO mice. (A) mRNA expression of FGFR4 and (B) bright-field microscopy of FGFR4 immunohistochemistry (scale bar = 75 µm) in 10-week-old 129Sv, 10-week-old B6 and 20-week-old B6 WT and Col4a3KO mice. Values are mean ± standard error, n = 3–7 per group. *P < 0.05 versus WT. NC, negative control; PC, positive control.
