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Membrane transporter


Auxin (IAA) is actively transported into cells by a transmembrane transporter and leaves the cells by facilitated diffusion through a different transporter.
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This proton motive force created by the ETC is used to power membrane transporters and adenosine triphosphate synthesis by ATP synthase (aka the F0F1 particle). They are used in photophosphorylation and respiration.
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This reaction consumes 1 ATP, but the energy is well-spent - it keeps [Glc]i low as to allow continuous entry of Glc through its plasma membrane transporters; prevents Glc leakage out - the cell lacks such transporters for G6P; ...
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