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In vitro characterization of 68Ga-Nb1159. (a) Schematic illustration of the synthesis of the 68Ga-Nb1159 probe. (b) The normalized radiochemical purity of unpurified and purified 68Ga-Nb1159, and the stability of 68Ga-Nb1159 at 4 h. (c) Stability analysis of 68Ga-Nb1159 over time in 0.01 M PBS and 5% HSA at 37°C. (d) Binding affinity assay of 68Ga-Nb1159 to RBD of SARS-CoV-2.
