Design of the OptoMYPT system (IMAGE) National Institutes of Natural Sciences Caption Design of the OptoMYPT system (upper). Blue light exposure induces translocation of SspB-PP1BD and endogenous PP1c from the cytoplasm to the membrane, leading to the inactivation of myosin near the membrane. The images below show membrane recruitment of SspB-PP1BD upon blue light exposure. Credit Aoki Lab Usage Restrictions Credit must be given to the creator. License CC BY 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.