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Epigenetic modifications have been defined as the structural alteration of chromosomal regions to register, signal or perpetuatealtered activity states. It has been shown that DNA-methylation can mediate heritage of properties that are not encoded in the DNA, and is therefore referred to as ¡®epigenetic modification¡¯

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Originally posted by zyy816 at 2009-10-18 18:14:
±í¹ÛÒÅ´«ÐÞÊζ¨ÒåΪȾɫÌåÇø¶Îת¼¡¢±êʶ»òÓÀ¾ÃÐԵĻ״̬·¢Éú¸Ä±ä¡£ÓÐÖ¤¾Ý±íÃ÷£¬DNAµÄ¼×»ù»¯ÄܸıäÄÇЩÔÚDNAÀïÎÞ±àÂëµÄÌØÐÔÒÅ´«£¬Òò´ËDNAµÄ¼×»ù»¯¿É¹éΪ¡°±í¹ÛÒÅ´«ÐÞÊΡ±¡£

ÎÒÏëÎÊÏ£¬Õâ¶Î»°ºóÃæ»¹Óо仰£ºA comparable role has not been proven for post-translational modifications of the histones.¸ÃÔõô·­Òë°¡£¿
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