The calcium ATPase:

The calcium ATPase:




  1. is much simpler than the sodium-potassium pump because it has only three transmembrane regions.
  2. pumps 15 calcium ions for each molecule of ATP consumed.
  3. uses the same intracellular domain for both nucleotide binding and ion translocation.
  4. pumps calcium in a cyclical process that utilizes energy from ATP.
  5. is unique among transporters in that its pumping action involves no conformational changes

Answer: 4


Biopsychology

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