FRST 200 Lecture Notes - Lecture 22: Thylakoid, Rubisco, Electrochemical Gradient
Document Summary
Energy is transferred from chlorophyll to chlorophyll with special chlorophyll p680 that loses an electron. Travels down electron transport chain (series of proteins and carriers) Ii. a proton gradient across thylakoid membrane which is harvested to generate atp reducing power (the electrons themselves) in the form of nadph. Removed from water to replace - to do this, water is split by a special protein at the reaction centre. 2 h2o needed to make 1 o2. Plants are very good at absorbing co2. For 1g of carbohydrate need 2500l of air. Most abundant protein on earth; accounts for 1/8 to 1/4 or more of total leaf protein. Rubisco attaches co2 to a 5 carbon substrate to produce 2 3 carbon products. These are reshuffled to regenerate the 5 carbon substrate and the final product, sugar. **o2 competes with co2 (rubisco prefers co2 but there is so much o2 that 30% of the time o2 is fixed by mistake
