Possible Interaction: Potassium and Magnesium Cation

“In the cardiac surgery patients, the potassium and magnesium concentrations were 46.35 +/- 3.89 and 4.40 +/- 0.58 (mean +/- SD, mumol/g wet weight tissue), respectively, and were significantly correlated (r = 0.54, P = 0.005).”

“Thus, potassium and magnesium concentrations were significantly correlated in all the tissues measured.”

“It has been further observed that calcium, sodium, potassium , and chlorides interfere seriously with the magnesium determination in giving false higher results.”

“Surprisingly, Mg++ also depolarized neuronal resting potential in a concentration-dependent manner with a +5.2 mV shift at 10 mM. Voltage ramps suggested that Mg++ blocked a potassium conductance contributing to the resting potential.”

“Variations in light-scattering and increases in potassium concentration, usually occurring during SD, also decreased when supervising with low calcium/ high magnesium solutions.”

“The presence of 0.64 mM calcium or magnesium ions exerted negligible effects on transport, although potassium was inhibitory.”

“The effect of the high potassium medium on catecholamine fluorescence was reduced by Ca++ influx inhibitors, diltiazem or Mg++.”

“During an investigation of certain kinetic properties of the cerebral microsomal enzyme, it was noted that, in the presence of potassium and magnesium ions , the degree of sodium activation was decreased when activity was assayed at room temperature rather than at the usual assay temperature of 37" (SWANSON, 1964).”

“I t is activated by sodium and potassium ions in the presence of magnesium ion , which by itself exerts only a mild activating effect.'”

“Whereas addition of magnesium ions stimulates CsLPAATs, calcium and potassium ions inhibit them in concentrations of 0.05–2.0 mM. All three types of ions inhibit CsLPEATs activity.”

“The magnesium content of cucumber seedlings was also significantly decreased compared with control treatment, especially in the IV treatment (suboptimal temperature +140 mmol · L(-1) NO3- + 1 mmol · L(-1) Mg2+), and the antagonistic impact of magnesium ion absorption on the absorption of potassium and calcium ion was observed.”