SYSTEM AND METHOD FOR INFERRING PROTEIN BINDING

    公开(公告)号:WO2019245946A1

    公开(公告)日:2019-12-26

    申请号:PCT/US2019/037433

    申请日:2019-06-17

    IPC分类号: G01N21/64

    摘要: Methods and apparatus for inferring protein binding based on rotational diffusion of a collection of fluorophores. One example of a method includes applying a first light pulse to excite a plurality of fluorophores in the collection of fluorophores to produce a plurality of excited fluorophores, the first light pulse having a first polarization and the plurality of excited fluorophores having a component of their orientation aligned with the first polarization, applying a second light pulse to stimulate emission by the plurality of excited fluorophores, the second light pulse having a second polarization orthogonal to the first polarization, after a time delay following application of the second light pulse, applying a third light pulse of the second polarization to further stimulate emission by the plurality of excited fluorophores, detecting polarized emissions from the plurality of excited fluorophores, and inferring the rate of rotational diffusion of the collection of fluorophores based on the detected polarized emissions.