C3 carbon fixation
（重定向自C3 plants）
![Calvin–Benson cycle](/Images/godic/202501/02/Calvin-cycle4.svg0413.png")
![Cross section of a C3 plant, specifically of an Arabidopsis thaliana leaf. Vascular bundles shown. Drawing based on microscopic images courtesy of Cambridge University Plant Sciences Department.](/Images/godic/202501/02/Cross_section_of_Arabidopsis_thaliana,_a_C3_plant.0413.jpg")
C3 carbon fixation is one of three metabolic pathways for carbon fixation in photosynthesis, along with C4 and CAM. This process converts carbon dioxide and ribulose bisphosphate (RuBP, a 5-carbon sugar) into 3-phosphoglycerate through the following reaction: