They found that for the mutants displaying calcium blocking, one or two calcium ions are located at the bottom of the selectivity filter. They also discovered that magnesium (Mg 2+) and strontium (Sr ...
Potassium channels are responsible for the selective permeation of K⁺ ions across cell membranes. K⁺ ions permeate in single file through the selectivity filter, a narrow pore lined by backbone ...
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