Using Light to Control Cell Clustering (image) Rensselaer Polytechnic Institute Caption A new study published in Nature Methods shows how blue light can be used as a switch to prompt targeted proteins to accumulate into large clusters. As seen in this time-lapse image, the solid white clusters form in about 60 seconds after exposure to blue light, and then break up completely about 13 minutes after the light is switched off. Credit Rensselaer/UC Berkeley Usage Restrictions Please include image credit 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.