Defying one of biology’s more persistent dogmas, a potassium channel combines functions once thought to be invariably asunder. This channel, which is found in common bacteria, incorporates a subunit ...

A general concept in biology is that cells use two different systems to transport substances across their membrane: selective pores, which allow passive transport driven by a concentration gradient, ...

A balanced potassium household is critical for the survival of both people and bacteria. As bacteria are exposed to much greater fluctuations in environmental conditions, the controlled intake of ...

SODIUM and potassium concentrations in human red cells are controlled by the sodium pump, and if passive leaks exceed rates of active transport cells undergo colloid osmotic haemolysis. Because the ...