Mouse Lung with Ensnared Bacterium (image) Rockefeller University Press Caption This image of a mouse lung, taken with a scanning electron microscope, shows a Klebsiella pneumonia bacterium (pink) snared in a neutrophil extracellular trap (green), a web of chromatin released by neutrophil immune cells to catch and kill pathogens. Papayannopoulos et al. reveal that two enzymes help neutrophils deploy these traps by unraveling the chromatin contained in the cells' nuclei. Credit Papayannopoulos, V., et al. 2010. J. Cell Biol. doi:10.1083/jcb.201006052 (Image by Volker Brinkman and Abdul Hakkim). Usage Restrictions Reporters may freely use these materials in news coverage, with the appropriate credit information. 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.