Abstract
In this method, we employed HEK293T cells to express the plant photoreceptor phytochrome B (phyB). Through the application of various treatments such as phycocyanobilin (PCB) supplementation, red light exposure, and temperature adjustments, the phyB proteins exhibited liquid-liquid phase separation, leading to the formation of biomolecular condensates. Here, we present a comprehensive description of the protein expression, cell treatment, and imaging capture procedures. This detailed guide provides step-by-step instructions on how to induce phase separation of phyB proteins in HEK293T cells. By utilizing this approach, researchers can investigate the physicochemical characteristics and dynamic formation process of phyB photobodies with precision.
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