Pushing the Envelope (IMAGE) Arizona State University Caption Transmission electron microscopy images of the cyanobacteria cells before and after the addition of nickel. ASU scientists swapped parts from bacteriaphages that infect E. coli and salmonella, simply added nickel to the growth media, where the inserted genes produced enzymes that slowly dissolved the cyanobacteria membranes from within. (A) Cells before nickel addition; (B) 6 h after nickel addition; (C) 12 h after nickel addition; (D) 24 h after nickel addition. Credit PNAS 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.