![]() ![]() This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. This transfer is powered by the proton gradient created by the other complexes in the photosynthetic ETC.ĪTP synthase creates ATP from the substrates ADP and Pi (inorganic phosphate).ĪTP, NADPH, and O 2 (molecular oxygen) are the vital final products of photosynthesis. The protons pass back through ATP synthase, driving the production of ATP. In both cases the electron transport chain uses the energy to pump hydrogen ions across a membrane. It must do this three times to synthesize one ATP. In photosynthesis electrons enter the transport chain after receiving light energy in respiration the electrons are provided by organic food molecules. Hence, ATP cannot be stored easily within cells, and the storage of carbon sources for ATP production (such as triglycerides or glycogen) is the best choice for energy maintenance. See the Flash movie for the following sequence of images,ĪTP synthase accepts one proton from the lumen space and releases a different proton into the stroma space to create the energy it needs to synthesize ATP. Non-cyclical photosynthesis is described by the following equation: 2 H 2 O + 2 NADP + + 3 ADP + 3 P i + light 2 NADPH + 2 H + + 3 ATP + O 2. We will focus on non-cyclical photosynthesis. On each of the thumbnail images will bring up a larger, labeled It is at this stage that photosynthesis can be broken into cyclical and non-cyclical processes. ATP synthase uses the proton gradient created by the photosynthetic ETC to synthesize ATP. PHOTOSYNTHESIS (LIGHT) > ADVANCED > 1.) PHOTO-II > 2.)ĬYTO B6-F > 3.) PHOTO-I > 4.) ATP SYNTHASEĪTP synthase is considered a part of the photosynthetic electron transport chain, but it is not involved in the transport of electrons. ![]()
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