Opening the Cavity Floodgates 1 (IMAGE) University of Freiburg Caption Four TatC molecules (blue) create a circle around four TatB molecules (green) to form a cavity in the center in which the protein to be transported can insert from below. Credit Source: <i>Journal of Biological Chemistry</i> 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.