Plants are green because of a pigment that is key to photosynthesis: chlorophyll. In its production, the enzyme chlorophyll synthase plays an important role. As part of an international collaboration, researchers from Osnabrück University, the Center Algatech in Třeboň and the University of Sheffield have now succeeded in deciphering the structure of this enzyme and gaining valuable insights into its mechanism. The findings are published in the journal Nature Chemical Biology.