K+ localization in muscle cells by autoradiography, and identification of K+ adsorbing sites in living muscle cells with uranium binding sites in electron micrographs of fixed cell preparations.
Localization of K+-adsorption sites on two peripheral regions of the A band and the Z line in frog voluntary muscle cells has been demonstrated with the aid of autoradiography and radioactive 134Cs and 204 Tl. The findings confirm the association-induction hypothesis, according to which intracellular K+ is adsorbed on the beta- and gamma-carboxyl groups of intracellular proteins.
D000327:Adsorption; D000818:Animals; D001001:Anura; D001345:Autoradiography; D001665:Binding Sites; D002588:Cesium Radioisotopes; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D009132:Muscles / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D011868:Radioisotopes; D013793:Thallium; D014501:Uranium
D002588:Cesium Radioisotopes; D011868:Radioisotopes; D014501:Uranium; D013793:Thallium; D011188:Potassium