The present disclosure provides methods of sequencing polynucleotides and compounds, compositions for sequencing of polynucleotides, and synthesis of such compositions. The chemical compounds include nucleotides and their analogs which possess a sugar moiety comprising a cleavable chemical group capping the 3'-OH group and a base, but without covalently bounded dye. The cleavable chemical group is reactive to form covalent bond(s) with a dye used to confirm the presence of the expected base-pairing. The cleavable chemical group capping the 3'OH group can be removed together with the covalently bounded dye. Furthermore, after the cleavable chemical group is cleaved, the free 3'-OH group can be active in continued elongation. Example chemical compounds according to the present disclosure are shown as Formulas (II) and (V).
本公开提供了测序多核苷酸和化合物的方法,用于测序多核苷酸的组合物,以及这些组合物的合成。这些化合物包括
核苷酸及其类似物,其具有包含可切除的
化学基团的糖基团,该基团覆盖3'-OH基团,并且含有一个碱基,但没有共价结合的
染料。可切除的
化学基团具有与用于确认期望碱基配对存在的
染料形成共价键的反应性。覆盖3'OH基团的可切除的
化学基团可以与共价结合的
染料一起被去除。此外,在可切除的
化学基团被切除后,自由的3'-OH基团可以在继续延伸中起作用。根据本公开的示例化合物如公式(II)和(V)所示。