CD19 and breast cancer: The results showed significant positive correlation between TUBB mRNA expression and gene markers of immune cells (CD79A, CD19, CD2, CD3E, and CD3D) in ERα-positive breast cancer patients (Figure 6, black bars), whereas negative correlations were observed between TUBB mRNA expression and several gene markers of immune cells (CD79A, CD19, CD2, CD3E, and CD3D) in ERα-negative breast cancer patients (Figure 6, grey bars).