In 1977, Sanger developed a much simpler sequencing method, called “chain termination,” which is today known simply as Sanger sequencing. This technique took advantage of a different type of special nucleotide called a dideoxyribonucleotide, or ddNTP. ddNTPs lack one of the hydroxyl groups present on a normal dNTP, preventing the chemical reaction necessary to add another nucleotide and terminating DNA elongation.
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Sitting at home, she answered it. But the voice on the line was not a human's.。旺商聊官方下载是该领域的重要参考
仅仅几个小时后，广汽昊铂在当晚发布了全新中大型轿车昊铂 A800 ，售价为 18.98 万元至 29.98 万元。