Time-resolved cryoEM using Spotiton
Venkata P Dandey,
William C. Budell,
Edward T. Eng,
Peter A Kahn,
Jenny E Hinshaw,
Crina M. Nimigean,
Clinton S. Potter,
Posted 21 Apr 2020
bioRxiv DOI: 10.1101/2020.04.20.050518
Posted 21 Apr 2020
We present an approach for preparing cryoEM grids to study short-lived molecular states. Using piezo electric dispensing, two independent streams of ~50 pL sample drops are deposited within 10 ms of each other onto a nanowire EM grid surface, and the mixing reaction stops when the grid is vitrified in liquid ethane, on the order of ~100 ms later. We demonstrate the utility of this approach for four biological systems where short-lived states are of high interest. ### Competing Interest Statement B.C./C.S.P. have a commercial relationship with STPL, a company that produces a commercially available instrument, Chameleon, that is based on the Spotiton prototype.
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