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Funding limitations prevented Nyren from dedicating much time to the project at first, but in 1993, he was finally able to publish a proof-of-principle. His technique began by mixing the template DNA with a primer, a single dNTP, and three enzymes: the familiar DNA polymerase plus the light cascade enzymes, ATP sulfurylase and firefly luciferase.6 If the dNTP was incorporated into a strand of DNA, PPi would be produced in the chemical reaction. ATP sulfurylase could then convert the PPi into ATP, which would provide energy for the luciferase enzyme, producing light. Thus, it was possible to determine each base in the sequence by cycling through the dNTPs one at a time until light was detected, and then washing extra nucleotides out between each step. By literally rinsing and repeating, the sequence could be recorded one letter at a time without the use of any gels, which often took hours to run and were difficult to automate.
18:16, 3 марта 2026Россия。业内人士推荐WPS官方版本下载作为进阶阅读
宜昌古称夷陵，素有“川鄂咽喉”之称，是巴楚文化交融之地，也是蜡梅原产地之一。本土花卉蜡梅见证了“三峡门户”2000多年的传承发展之路，从先民耕耘生息，到屈子行吟、长坂烽烟，花开花谢千百次，默默守望古城成长。蜡梅不仅为宜昌带来醉人景观和自然意趣，也将城市人文与自然禀赋深度融合，成为城市精神的重要载体。