A modified nucleoside analogue having the formula (I): P-S-B-L-R where: P is a 5′ triphosphate or analogue or derivative thereof; S is a substituted or unsubstituted five- or six-membered sugar, sugar analogue or acyclo sugar analogue, but excluding a dideoxy-sugar, B is a substituted or unsubstituted nitrogenous base or base analogue or derivative thereof; L is a linker group; and R is a substituted or unsubstituted metallocene moiety or substituted or unsubstituted metal complex or substituted or unsubstituted redox-active organic moiety. The modified nucleoside is capable of enzymatic incorporation into a nucleotide chain and allows for redox labelling of nucleotides.
具有式(I)的改良核苷类似物:P-S-B-L-R 其中P 是 5′
三磷酸或其类似物或衍
生物;S 是取代或未取代的五元或六元糖、
糖类似物或酰基
糖类似物,但不包括双脱氧糖;B 是取代或未取代的含氮碱或碱类似物或其衍
生物;L 是连接基团;R 是取代或未取代的茂
金属分子或取代或未取代的
金属络合物或取代或未取代的氧化还原活性有机分子。经修饰的核苷能够通过酶掺入核苷酸链中,并可对核苷酸进行氧化还原标记。