1.1.1.39 C4 and CAM-carbon fixation C4 and CAM-carbon fixation - 1.1.1.39 Carbon fixation in photosynthetic organisms - 00710 1.1.1.39 Metabolic pathways - 01100 1.1.1.39 Microbial metabolism in diverse environments - 01120 1.1.1.39 Pyruvate metabolism - 00620