Fig. 5

Protein expression levels of COL8A1 in breast cancer (BRCA) and normal breast tissues. a-d normal breast tissues; e–h BRCA tissues (Magnification × 200). COL8A1 was negatively stained in normal breast epithelium (a) and BRCA (e). COL8A1 was weakly stained in normal breast epithelium (b) and BRCA (f). COL8A1 was moderately stained in normal breast epithelium (c) and BRCA (g). COL8A1 was strongly stained in normal breast epithelium (d) and BRCA (h). According to staining intensity and percentage of color range, 45.2% BRCA tissues exhibited low COL8A1 expression and 54.8% BRCA tissues exhibited high COL8A1 expression. While 67.7% normal breast tissues exhibited low COL8A1 expression and 32.3% normal breast tissues exhibited high COL8A1 expression