Degradation of Sulfoquinovose (IMAGE) University of Konstanz Caption The picture shows the degradation of sulfoquinovose (SQ) by Escherichia coli to a sulfur-containing intermediate (DHPS), which is excreted. Another bacterium, Desulfovibrio, utilizes this intermediate for anaerobic respiration and produces toxic hydrogen sulfide (H2S). Credit Copyright: Daniel Schleheck / <i>Frontiers Microbiology</i> 2018 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.