Ca2+ pump

The Ca2+ pump is a transport ATPase because it moves, in this case, calcium ions across the membrane using ATP as an energy source, i.e. it uses active transport. The Ca2+ pump is similar to the Na+-K+ ATPase in the way that both are P-type pumps. It is found in a skeletal muscle cell and in the process of reabsorbing the Ca2+ ions that were used to generate muscle contraction.