Association between the CD44 rs13347C>T polymorphism and the CD44 protein expression. (A) CD44 protein levels in 39 breast cancer tissues from individuals who carried different rs13347 genotypes. The CD44 protein expression levels were normalized to that of GAPDH by calculating the relative expression levels. (B) Analysis of protein levels in 39 breast cancer tissues from individuals who carried different genotypes. (C) Immunohistochemistry analysis of CD44 protein expression levels in breast cancer tissues. HE staining (above) and CD44 antibody staining (below) (SP, ×40, ×100, ×200).