Genomics Exercise 2 (image) University of Illinois at Urbana-Champaign, News Bureau Share Print E-Mail Caption Participants Clinton Ray Lageson, left, and Harmony Knudsen work to isolate mitochondrial DNA. Deborah Bolnick, background, sets a timer for a centrifuge in the lab. Credit Photo by Fred Zwicky Usage Restrictions Image may be used only with stories about the events described in this release. Credit required: Photo by Fred Zwicky. Share Print E-Mail 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.