Methods are described for analyzing at least one polymorphic site in a biological sample containing at least one single-stranded template, including the steps of: combining the biological sample with a primer specific for each polymorphic site in each template and a primer extension preparation, to form an assay mixture; wherein the preparation includes: chain terminating nucleotides forming a first nucleotide class, chain elongating nucleotides forming a second nucleotide class such that the second nucleotide class does not include a nitrogenous base present in the first nucleotide class, and a template-dependent nucleic acid polymerase; incubating the mixture for a time and at a temperature sufficient to extend each primer by addition of at least one nucleotide; and determining the size of each extended primer. Kits suitable for practising the invention are also provided.
描述了分析含有至少一个单链模板的
生物样品中至少一个多态位点的方法,包括以下步骤:将
生物样品与每个模板中每个多态位点的特异性引物和引物延伸制备物结合,形成检测混合物;其中制备物包括形成第一类核苷酸的链终止核苷酸、形成第二类核苷酸的链延长核苷酸(第二类核苷酸不包括第一类核苷酸中的含氮碱基)和依赖于模板的核酸聚合酶;将混合物在足以通过添加至少一种核苷酸延伸每种引物的时间和温度下孵育;以及确定每种延伸引物的大小。还提供了适用于实施本发明的试剂盒。