Mycobacterium tuberculosis (image) American Chemical Society Share Print E-Mail Caption Mycobacterium tuberculosis, shown in red, is known to propagate in macrophage cells (left), but loses that ability when MenJ is knocked out (right). Credit American Chemical Society Usage Restrictions Please credit the American Chemical Society when using this image. 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.