Cell-membrane proteins {sodium-potassium pump} can use one-third of all ATP, keep cell volume constant, make membrane excitability possible, and drive amino-acid and sugar active transport. If sodium is present, ATPase phosphorylates. Conformational change carries sodium ion from cell inside to outside, and potassium ion from outside to cell inside, against concentration gradients. Digitalis affects sodium-potassium pumps.
Physical Sciences>Chemistry>Biochemistry>Protein>Chemical Reaction
5-Chemistry-Biochemistry-Protein-Chemical Reaction
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Date Modified: 2022.0224