BIOS 240 Lecture Notes - Lecture 15: C4 Carbon Fixation, C3 Carbon Fixation, Green Leaves
17 Sep 2016
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Phosphorous regulation (inorg)- in calvin cycle, in glycolytic pathway, in many of the biological pathways that deal with carbohydrates, for them to be metabolically active, need to be phosphorylated. Puts phosphate grp in carbon 6 of gluc, from there becomes part of glycolytic pathway, broken down to make nadh that serves as e- donor in mitochond. Because p is competing with two processes phosphorylate carbs in cc to make triose-p, also need phosphate for atp. if don"t have atp, cnat run cc to make sugar. How that"s achieved- tp is excess 3c sugar that we have from cc. Tp move out from chloroplast to cytoplasm, when its moved out, you move out a phosphate group out also. Basically removing phosphate from stroma into cytoplasm, limiting synth of atp and sugars in chloroplast. As transphosphate comes out, it exchanges with pi grp that comes in. net movement of material is the triose only because pi gets cancelled.
