A new method suitable for single nucleotide polymorphism detection and other applications based on oligonucleotide probe extension has been developed. The method is based on mass spectrometry and utilizes a single surface for affinity purification of extended probes and matrix-independent desorption/ionization of the cleavable labels. A new family of sulfur-linked laser-cleavable trityl labels with vastly improved flying abilities is implemented in this study. Corresponding reagents compatible with automated oligonucleotide synthesis are presented. Utility of this method for SNP genotyping is demonstrated.
基于寡核苷酸探针延伸,一种适用于单核苷酸多态性检测和其他应用的新方法应运而生。该方法以质谱法为基础,利用单一表面对延伸探针进行亲和纯化,并对可裂解标签进行基质无关的解吸/电离。本研究采用了一种新的
硫键激光可裂解三苯甲基标签系列,其飞行能力大大提高。同时还介绍了与自动寡核苷酸合成兼容的相应试剂。证明了这种方法在 SNP
基因分型中的实用性。