On the day of assay, the mannitol and sucrose (MAS) buffer (1) was prepared by diluting sterile-filtered MAS 3 in distilled water, resulting in a solution with the following final concentrations: 220 mM mannitol, 70 mM sucrose, 10 mM KH 2 PO 4 , 5 mM MgCl 2 , 2 mM HEPES, 1 mM EGTA and 0.2% w/v fatty-acid free BSA (3117057001) (pH 7.2), and warmed to 37 C
[ 64 Cu] levels were estimated as the mean standard uptake value (g/ml) in volumes of interest in liver, kidney, bladder, and gut
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Ethics declarations Competing interests The authors declare the following competing interests: T.M