Optical Microscopy (IMAGE) St. Petersburg State University Caption Optical microscopy of vicilin fibrils obtained in vitro and stained with Congo red dye in transmitted (left) and polarised (right) light. Credit Antonets et al., PLOS Biology, 2020. 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.