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A. Immunoblotting showing the expression levels of DNMT1 (DNA methytransferase 1), GSTP1 (π-class glutathione S-transferase), and acetylated histone H3 lysine 4 (H3K4) in LNCaP cells and sphere cells maintained in regular FBS medium. β-actin was used as a loading control. B. Immunohistochemical staining of GSTP1 on paraffin embedded preparations of LNCaP cells (left), and sphere cells (right) maintained in regular FBS medium.
