artificial metalloenzyme (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption An artificial metalloenzyme based on the natural enzyme called P450 (gray structure). UC Berkeley chemists created a heme molecule (magenta) with an embedded iridium atom (red) that, in E. coli, was incorporated into P450 to execute a reaction unknown in the natural world. Credit UC Berkeley image by Brandon Bloomer Usage Restrictions Credit Brandon Bloomer, UC Berkeley 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.