WNKs in Phase Separation (VIDEO) University of Pittsburgh This video is under embargo. Please login to access this video. Caption University of Pittsburgh and Carnegie Mellon University scientists solved a decades-old mystery regarding how cells control their volume. In this video, WNK kinases (a type of enzyme) are fluorescent and diffuse throughout the cell. When exposed to a salt solution, they coalesce into larger droplets, looking like the bright green goo in a lava lamp. This process, called “phase separation,” is how the cell knows it needs to bring both water and ions back in, returning to its original state within seconds. Credit Boyd-Shiwarski, et al., Cell (2022). Usage Restrictions Only for use in reporting on the study this video goes with. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.