The intracellular concentration of free magnesium in extensor digitorum longus muscles of the rat.
Magnesium-sensitive microelectrodes were used to measure the intracellular concentration of free Mg2+, [Mg2+]f, in rat extensor digitorum longus muscles in vitro at 30 degrees C. The intracellular activities of Na+ and K+ were also determined so that allowance could be made for the interference from these ions with the Mg2+ electrode response. The mean value for [Mg2+]f based on twenty-six measurements in twelve muscles was 0.47 mM.
MacDermott
M
M
Department of Physiology, Royal College of Surgeons, Dublin, Republic of Ireland.
D000818:Animals; D003593:Cytoplasm / Q000737:chemistry; D008274:Magnesium / Q000032:analysis*; D008297:Male; D008564:Membrane Potentials; D008839:Microelectrodes; D009132:Muscles / Q000737:chemistry*; D011188:Potassium / Q000032:analysis; D051381:Rats; D011919:Rats, Inbred Strains; D012016:Reference Values; D012964:Sodium / Q000032:analysis
D012964:Sodium; D008274:Magnesium; D011188:Potassium