Thomas Happe, Ruhr-University Bochum (IMAGE) Ruhr-University Bochum Caption Green algae possess an enzyme for producing hydrogen, called hydrogenase. Together with his colleagues, Thomas Happe engineers such enzymes in the test tube. Credit RUB, Marquard Usage Restrictions This image may only be used when reporting about results described in the press release "Synthesis of hydrogen: enzymes assemble themselves in the test tube" (May 2016). 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.