4In 2007, Barrangou et al. demonstrated for the first time the function of CRISPR/Cas9 as a defensive mechanism of bacteria against bacteriophage attacks by a technique called “plaquing” which builds upon the technique of “plating” bacteria on agar. Plaques of viruses on agar are areas without growth of bacteria due to viral attacks.
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海南在今年为期 9 天的春节假期迎来旅游消费强劲复苏，咖啡茶饮行业同步受益。
韓國產業部長金正寬（Kim Jung-Kwan）週一表示，已支付的關稅是否能退還仍存在不確定性。金正寬還稱，特朗普在裁決後宣布的關稅並未針對電腦晶片（芯片）。