Chapter_19

Chapter_19 - The light reaction of photosynthesis I....

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Unformatted text preview: The light reaction of photosynthesis I. Photosynthesis takes place in chloroplasts CO 2 + H 2 O -------> (CH 2 O) + O 2 Light The light reaction of photosynthesis I. Photosynthesis takes place in chloroplasts CO 2 + H 2 O -------> (CH 2 O) + O 2 Light The thylakoid membrane: contains the energy- transducing machinery: light-harvesting proteins, reaction centers, electron transport chains and ATP synthase. The thylakoid membrane and inner membrane: impermable; Outer member: permeable. The light reaction of photosynthesis II. Light absportion by chlorophyll induces electron transfer CO 2 + H 2 O -------> (CH 2 O) + O 2 Light The light reaction of photosynthesis II. Light absportion by chlorophyll induces electron transfer Photoinduced charge separation Light absportion by chlorophyll induces electron transfer I. Photosynthetic Bacteria and the photosynthetic reaction centers of grant plants have a common core Photoinduced charge separation Light absportion by chlorophyll induces electron transfer I. Photosynthetic bacteria and the photosynthetic reaction centers of grant plants have a common core Photosynthesis in green plant: PSI and PSII; PS I: 13 chains, >60 chlorophyll, 1 Q, 3 4Fe-Fs clusters; 800 kd; PS II: 10 chains, > 30 chlorophyll, nonheme Fe, 4 Mn 2+ ; Photosynthetic photosynthetic reaction center: L (31 kd), M (36 kd), H (28kd) and C- cyt c like Light absportion by chlorophyll induces electron transfer I. Photosynthetic bacteria and the photosynthetic reaction centers of grant plants have a common core L ; M ; 5 TM helices H: 1 helix; cytoplasmic side; Cyt-c subunit. Periplasmic side; 4 c-heme; 4 Bchl-b and 2 BPh; Light absportion by chlorophyll induces electron transfer I. Photosynthetic bacteria and the photosynthetic reaction centers of grant plants have a common core P960 - special pair; Charge separation -- 10-11 sec Light absportion by chlorophyll induces electron transfer I. Photosynthetic bacteria and the photosynthetic reaction centers of grant plants have a common core P960 - special pair; Charge separation -- 10-11 sec Prevent back-reaction Light absportion by chlorophyll induces electron transfer...
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This note was uploaded on 09/13/2010 for the course BIOL 4087 taught by Professor Waldrop during the Spring '08 term at LSU.

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Chapter_19 - The light reaction of photosynthesis I....

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