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 ...

The alternative to active transport is passive transport, which uses kinetic energy only to move the molecules. Passive transport can only move molecules from a region of higher concentration to lower ...

Journal of Experimental Botany, Vol. 15, No. 45 (October 1964), pp. 422-427 (6 pages) The electrical potential difference between the exuding sap of detopped castor oil plants and the external 1 mM ...