Li+ binding in subcellular fractions of human neuroblastoma SH-SY5Y cells was investigated using 7Li NMR spin-lattice (T1) and spin-spin (T2) relaxation measurements, as the T1/T2 ratio is a sensitive parameter of Li+ binding. The majority of Li+ binding occurred in the plasma membrane, microsomes, and nuclear membrane fractions as demonstrated by the Li+ binding constants and the values of the T1/T2 ratios, wh...
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