Biology / Bio 0512 · Atom · ~20 seconds
Energy Coupling and Phosphorylation
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Energy coupling pairs ATP hydrolysis with an endergonic reaction, often by phosphorylation — transferring ATP's terminal phosphate onto another molecule.
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The sodium-potassium pump from Bio 0362 is phosphorylated by ATP, and that transfer drives the conformational change moving sodium and potassium.
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The energy does not leap to the second reaction — phosphorylation physically links the two.