T

To the Calvin cycle for CO2 reduction

ADP + P Cyclic electron i transport

FIGURE 9.5 Generation of ATP and reducing equivalents (NADH) in: (A) chemoorganotrophs in which substrates are oxidized within the cytoplasm (e.g., Pseudomonas spp.); (B) chemolithotrophs in which substrates are oxidized at the membrane (e.g., Nitrobacter spp.); (C) anoxygenic phototrophic bacteria, Rhodospirillaceae (purple nonsulfur bacteria), Chromatiaceae (purple sulfur bacteria), Chlorobiaceae (green sulfur bacteria), and Chloroflexaceae (green gliding bacteria), when oxidizing substrates such as H2; or (D) oxygenic phototrophic cyanobacteria. Small circles within the plasma membrane (M) or thylakoid membrane (T; an intracytoplasmic membrane) represent redox complexes. PS Rxn, photosynthesis reaction site.

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