Figure 6. Validation of biomarkers. (A) The mRNA expression of KCND2 and VSTM4 in 20 pairs of tissues, including TNBC adjacent cancer and tumor tissues. (B) The protein expression of KCND2 was verified in cell lines. (C) The expression of KCND2 in the TNBC adjacent cancer and tumor tissues was verified by immunohistochemistry. NS, no significance; ***P < 0.001.