Light-independant reactions

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A-Levels Biology 4 (Photosynthesis and respiration) Mindmap am Light-independant reactions, erstellt von harry_bygraves am 30/05/2013.
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Light-independant reactions
  1. The Calvin Cycle; carbon dioxide fixation involves a five-carbon coumpound called ribulose bisphosphate (RuBP) and an enzyme called ribulose bisphosphate caboxylase (ribisco). With the catalytic help of rubisco, RuBP combines with CO2 to form an unstable six-carbon compound which splits immediately into two molecules of a three-carbon compound, glycerate bisphosphate (GP). GP is then reduced to a triose phosphate called glyceraldehyde 3-phosphate (GALP). This reaction requires hydrogen and energy from ATP; both are supplied by the light-dependant reactions. About one-sixth of the total GALP is then used to make glucose. This can be converted into other carbohydrates. The remaining five-sixths is converted back to RuBP. The regeneration of RuBP requires phosphate from ATP
    1. Calvin cycle
      1. Rubisco catalyses fixation CO2
        1. 6-C intermediate
          1. 2 x glycerate 3-phosphate (GP)
            1. GALP
              1. 1/6 GALP
                1. Glucose
                  1. amino acids
                    1. Lipids
                      1. Sucrose
                    2. RuBP
                      1. 3 CO2
                2. 3 CO2
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