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Nyren’s sequencing method earned the name “pyrosequencing” since it revolved around the production of pyrophosphate. At first, pyrosequencing could sequence only short DNA snippets, with a few nucleotides. In 1996, however, Nyren’s lab demonstrated sequencing of up to 15 bases by using a modified “A” nucleotide to reduce their signal-to-noise ratio.7 In 1998, they increased this to 34 bases by adding another enzyme, called apyrase, to the mix; apyrase degraded unincorporated nucleotides, removing the need for constant wash steps.
。业内人士推荐体育直播作为进阶阅读
這可能來自線人報告，但更可能是對伊朗個別人士進行的技術性追蹤。
全国两会召开在即，全国政协委员、广西体育高等专科学校审计与质量管理处处长韦军忙着整理工作笔记，完善提案内容。