Other potassium ions are often used to hold anions.

The blue line shows the I-V relationship for the potassium ion.

In the cell cytoplasm, each potassium ion is surrounded by a shell of water.

The channels enable potassium ions to cross the cell membrane.

This taste is because of the potassium ion.

This means that potassium ions can no longer diffuse out of the cell.

These channels transport positively charged potassium ions into and out of cells.

The high affinity of 18-crown-6 for potassium ions contributes to its toxicity.

This conformation changes when valinomycin is bound to a potassium ion.

But in order for this process to occur, a concentration gradient of potassium ions must first be set up.