Which of the Following Is True About the (Na⁺-K⁺)-ATPase Transporter

question 27

Multiple Choice

Which of the following is true about the (Na⁺-K⁺) -ATPase transporter?

• A)Three potassium ions bind to the cytostolic face of the transporter in the E1 state.
• B)GTP binds to it and is hydrolyzed to form GDP and a high energy phosphorylated glutamyl residue.
• C)Formation of the high-energy phosphorylated glutamyl residue triggers a conformational shift from the E1 form to the E2 form.
• D)Phosphate hydrolysis of the E2 state releases potassium ions to the cytosol and results in rearrangement to the E1 state.
• E)All of the above correctly describe this transporter.

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