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The cooperation between Photosystems I and II creates an electron and proton flow from H 2 O to NADP +, producing NADPH needed for glucose synthesis. This pathway is called the ' Z-scheme ' because the redox diagram from H 2 O to NADP + via P680 and P700 resembles the letter Z. [ 11 ]
The main function of PSII is to efficiently split water into oxygen molecules and protons. PSII will provide a steady stream of electrons to PSI, which will boost these in energy and transfer them to NADP + and H + to make NADPH. The hydrogen from this NADPH can then be used in a number of different processes within the plant. [2]
The electron transport chain of photosynthesis is often put in a diagram called the Z-scheme, because the redox diagram from P680 to P700 resembles the letter Z. [3] The final product of PSII is plastoquinol, a mobile electron carrier in the membrane. Plastoquinol transfers the electron from PSII to the proton pump, cytochrome b6f. The ultimate ...
The control of enzyme activity due to pH changes align with the hypothesis that NADP-ME is most active while photosynthesis is in progress: Active light reactions leads to a rise in basicity within the chloroplast stroma, the location of NADP-ME, leading to a diminished inhibitory effect of malate on NADP-ME and thereby promoting a more active ...
Unlike non-cyclic photophosphorylation, NADP + does not accept the electrons; they are instead sent back to the cytochrome b 6 f complex. [citation needed] In bacterial photosynthesis, a single photosystem is used, and therefore is involved in cyclic photophosphorylation.
The energized electrons transferred to plastoquinone are ultimately used to reduce NADP + to NADPH or are used in non-cyclic electron flow. [1] DCMU is a chemical often used in laboratory settings to inhibit photosynthesis. When present, DCMU inhibits electron flow from photosystem II to plastoquinone.
In enzymology, a NADPH dehydrogenase (EC 1.6.99.1) is an enzyme that catalyzes the chemical reaction. NADPH + H + + acceptor NADP + + reduced acceptor. The 3 substrates of this enzyme are NADPH, H +, and acceptor, whereas its two products are NADP + and reduced acceptor.
Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... SsuE) is an enzyme with systematic name FMNH 2:NADP + oxidoreductase. [1] [2] [3 ...