BMV viruses assembling (VIDEO) San Diego State University This video is under embargo. Please login to access this video. Caption Recorded with the iSCAT microscope, this video shows individual BMV viruses assembling at 55x normal speed. Each dark spot is a different virus particle and the darkness of the spot indicates its size. Different particles appear at different times, providing evidence that the viruses assemble in two phases - nucleation and growth. Credit SDSU Usage Restrictions Video may be used in conjunction with a story about this research only. 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.