Modular microfluidics enables kinetic insight from time-resolved cryo-EM

There is a growing interest in performing time-resolved cryo-EM studies. Here, the authors present a time-resolved sample preparation method for cryo-EM called trEM, which uses a microfluidic device to initiate the biochemical reaction by rapid mixing of the components and then spraying the sample onto a cryo-EM grid to snap-freeze it in a blot-free, automated manner within several milliseconds.