1Lecture 12Lecture 12Read: BBOM 11e Sec. 17.5-17.6, 13.3, 5.15•Oxygenic Photosynthesis•Diversity of Bacterial Phototrophs•Dark Reactions = BiosynthesisOxygenic Photosynthesis•Diversity of Bacterial Phototrophs•Dark Reactions = BiosynthesisRC IRead: BBOM 11e Sec. 17.5½ H2O=>e-=>e-donorPS IPS IINADP+NADPHe-Reducing power for CO2fixation(1) RC II absorbs photon,water is split(2) Medium-low redox potentialintermediate e-donor is formed¼ O2+ H+(4) A second photon is absorbed by RC I induces moree-transport for reducing powerRC IIOxygenic PhotosynthesisOxygenic PhotosynthesisNon-cyclic electron flow generates ATP and NADPH2 photosystems, 2 reaction centers (PS I, RC I / PS II, RC II) --“Z” scheme of electron flow (5 events)(5) Cyclic e- flow in PS Igenerates more PMF & ATP when NADPH accumulatesATPPMF(3)ETSATP
has intentionally blurred sections.
Sign up to view the full version.