New Explanation for Key Step in Anthrax Infection Proposed by NIST and USAMRIID (image) National Institute of Standards and Technology (NIST) Share Print E-Mail Caption Anthrax toxins are sequestered from the cell surface (top) in a bubble-like endosome. The toxins have been thought to escape the endosome by threading their way through a hole in the endosome (lower left), but a new hypothesis suggests they may rupture the endosome (lower right). Credit Robertson/NIST Usage Restrictions None 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.