Iron uptake by ferritin: NMR relaxometry studies at low iron loads

Twenty ferritin samples were prepared at pH 6.5 with average loadings of 0–89 Fe atoms per molecule. Nuclear magnetic relaxation times T 1 and T 2 were measured at 3°C, 23°C, and 37°C and at field strength from 0.025 to 1.5 T. The field dependence, temperature dependence, and approximate equality of...

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