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Fig. 6. hCAF1 regulates Sam68 and histone H4 methylation in MCF-7 cells. (A) Extracts from MCF-7 cells transfected with scramble or specific hCAF1 siRNA duplexes or treated with Adox were immunoprecipitated using anti-Sam68 antibody, then analyzed by western blotting with ASYM24 after stripping with anti-Sam68 antibody. (B) Acid-extracted histones from MCF-7 cells transfected either with scramble or specific hCAF1 or PRMT1 siRNA duplexes were resolved on SDS-PAGE and revealed by western blotting using the anti-dimethyl-Histone H4 (Arg3) antibody.