METHODS AND COMPOSITIONS FOR MULTISTAGE PRIMER EXTENSION REACTIONS

    公开(公告)号:US20230126241A1

    公开(公告)日:2023-04-27

    申请号:US17914700

    申请日:2021-02-03

    IPC分类号: C12Q1/686 C12Q1/6876

    摘要: Methods and compositions are described for multi-stage primer extension reactions such as multiplex polymerase chain reactions (PCR) and reverse transcriptase PCR. Primer extension stages are performed in a closed vessel without opening the vessel between stages. The multi-stage primer extension methods and compositions utilize earlier stage primers in an earlier stage and later stage primers in a later stage, wherein the later stage primers are blocked from extension during the earlier stage. The blocked primers of the present technology comprise photocleavable blocking groups and are substantially inactive until the blocking group is cleaved by exposure to ultraviolet light. The blocked primers can be activated by ultraviolet light without opening the vessel.