Disturbance-free rapid solution exchange for magnetic tweezers single-molecule studies.

ABSTRACT: Single-molecule manipulation technologies have been extensively applied to studies of the structures and interactions of DNA and proteins. An important aspect of such studies is to obtain the dynamics of interactions; however the initial binding is often difficult to obtain due to large mechanical perturbation during solution introduction. Here, we report a simple disturbance-free rapid solution exchange method for magnetic tweezers single-molecule manipulation experiments, which is achieved by tethering the molecules inside microwells (typical dimensions-diameter (D): 40-50 μm, height (H): 100 μm; H:D∼2:1). Our simulations and experiments show that the flow speed can be reduced by several orders of magnitude near the bottom of the microwells from that in the flow chamber, effectively elim

SUBMITTER: Le S 

PROVIDER: S-EPMC4787821 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature