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The GJA1 expression level is more variable in breast tumor than in normal tissue and varies with subtype. (a) The GJA1 mRNA level in normal breast tissue and in each tumor intrinsic subtype. (b) The Cx43 protein level in each intrinsic subtype. In the legend, “Breast” indicates adjacent normal breast tissue. All data are from the TCGA dataset. p value: * <0.05; ** <0.01; *** <0.001; NS Not statistically significant.
