Spirulina powder (IMAGE) University of Utah Caption Mesfin Gewe, senior scientist at Lumen Bioscience, holds a dish filled with powdered spirulina cells, each one filled with a therapeutic protein payload. To target methane gas, the spirulina will have been engineered to express the methanogen-targeting lysin protein. Once in the cow rumen, the protein will destroy the methanogen microbes. Credit Lumen Bioscience Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.