title: Cell surface membranes in close contact. Role of calcium and magnesium ions.
mesh_terms: D002118:Calcium; D002462:Cell Membrane; D002463:Cell Membrane Permeability; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D007477:Ions; D008274:Magnesium
chemical_list: D007477:Ions; D008274:Magnesium; D002118:Calcium