BIO 201 Lecture Notes - Lecture 24: 3-Phosphoglyceric Acid, Carbon Fixation, Cellular Respiration
11 Apr 2017
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Makes sugar from co2 using energy of atp and reducing power of nadph: this is anabolic, reduction, endergonic c. i. Three steps: carbon fixation, reduction reactions, regeneration of rubp. Simplified net reaction: co2 + atp + nadph g3p + adp + Nadp: g3p is mostly transported out of the chloroplast to make glucose and other sugars b. i. The calvin cycle itself does not directly make sugars, but makes g3p instead b. ii. Step 1: carbon fixation: takes co2 from atmosphere, incorporates into organic molecules, catalyzed by rubisco b. i. Rubisco is the most abundant protein on the planet b. ii. It is the enzyme that fixes carbon: co2 is pushed into a 5-carbon compound, creating a 6-carbon compound c. i. This 6-carbon compound immediate splits into two 3-carbon compounds named 3pg. 4-3-17: this is the only reaction that we know of that can bring co2 in and make organic compounds out of it.
