A Japanese research group led by Associate Professor ASHIDA Hiroki (Graduate School of Human Development and Environment, Kobe University), Academic Researcher KONO Takunari (Graduate School of Human Development and Environment, Kobe University), and Professor MATSUMURA Hiroyoshi (Ritsumeikan University) has discovered an evolutionary model for the biological function that creates CO2 from glucose in photosynthesis. They found the mechanism in a primitive, non-photosynthesizing microbe.