3-27-09_Notes - Ribose synthesis will NOT BE ON THE MIDTERM...

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- Ribose synthesis will NOT BE ON THE MIDTERM - Bacterial (anoxygenic) photosynthetic reaction center has 4 polypeptide subunits;  transmembrane L and M stromal H and preiplasmic cytiochrome - It is possible to carry out the photosynthetic reaction without involving water - Bring protons into periplasmic space - Space between the membrane will give cytoplasmic space - - - Simple model for system found in chloroplast - Heme has iron instead of magnesium - Special pair refers to two chlorophyll a molecules, located adjacent to each other - They are bound to different subunits, and they come together to form the reaction center - Form a wavelength that is long enough and has enough energy - Instead of splitting water to produce oxygen, it splits H2S to produce sulfide - To get electrons and reducing power - Longer wavelength  - As soon as special pair is excited, it goes to higher energy state - Electron becomes donor and transfers electrons - Tightly bound on L subunit - Electron travels all the way from 960 to Q A - The heme donates an electron before the electron that hasn’t been removed, can go  back - Transferring electrons - Heme is located in cytochrome, in contact with thylakoid space
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3-27-09_Notes - Ribose synthesis will NOT BE ON THE MIDTERM...

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