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  Displaying 但ﾂ�ﾂ藁ood swings但ﾂ�ﾂ� that researchers compare to those of Dr. Jekyll and Mr. Hyde, the protein E2F sometimes boosts tumor cell growth and at other times suppresses it. ﾂ�According to the researchers at Oxford University who discovered E2F, they have found a way to block the abnormal protein但ﾂ�ﾂ冱 change into the deadly 但ﾂ�ﾂ廴r. Hyde但ﾂ�ﾂ� 但ﾂ�ﾂ� a move that results in cancer cell death.