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Department of Biophysics, University of Aarhus, DK-8000 Aarhus, Denmark
Proteins of the FXYD family act as tissue-specific regulators of the Na-K-ATPase. They are small hydrophobic type I proteins with a single-transmembrane span containing an extracellular invariant FXYD sequence. FXYD proteins are not an integral part of the Na-K-ATPase but function to modulate its catalytic properties by molecular interactions with specific Na-K-ATPase domains.
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