基因编辑工具箱再添利器
美国多家医院团队在《自然》杂志发表研究成果，开发出新型基因编辑工具STITCHR，可通过RNA系统精准替换基因，将治疗基因插入特定位置，且不引发突变，为基因治疗研究带来重大进展。
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基因编辑工具箱再添利器 中国科技网/科学网/财联社
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The lead from Wall Street offers little clarity as the major averages opened lower on Friday and then bounced back and forth across the unchanged line, finally finishing mixed and little changed.The Dow added 33.18 points or 0.10 percent to finish at 34,798.00, while the NASDAQ eased 4.54 points or 0.03 percent to close at 15,047.70 and the S&P 500 rose 6.50 points or 0.15 percent to end at 4,455.48. For the week, the Dow rose 0.6 percent, the NASDAQ added 0.1 percent and the S&P gained 0.5 percent.The lackluster performance on Wall Street came on uncertainty about the outlook for the markets following recent volatility.
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