A versatile microfluidic device is described that enables the crystallization of an enzyme using the counter-diffusion method, the introduction of a substrate in the crystals by soaking, and the 3D structure determination of the enzyme:substrate complex by a serial analysis of crystals inside the chip at room temperature.
de Wijn, R., Rollet, K., Olieric, V., Hennig, O., Thome, N., Noûs, C., Paulus, C., Lorber, B., Betat, H., Mörl, M., Sauter, C. Crystallization and Structural Determination of an Enzyme:Substrate Complex by Serial Crystallography in a Versatile Microfluidic Chip. J. Vis. Exp. (169), e61972, doi:10.3791/61972 (2021).