Squid proteins in human cells (IMAGE) University of California - Irvine Caption The black and white phase microscope image above helped UCI researchers identify where the squid reflectin protein nanostructures were present in human cells (dark regions, with some indicated by white arrows). The panel in color shows the associated pathlength for light traveling through a given area (red corresponds to longer pathlengths and blue corresponds to shorter pathlengths). Credit Atouli Chatterjee / UC Usage Restrictions None License Licensed 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.