Table 2 Internalization efficiency (internalized activity in % of total cellular activity) of [125I]CPCR4.3 (0.1 nM) and the reference [68Ga] Pentixafor (1 nM) in different human cancer cell lines after 60 min at 37 °C. Data are corrected for non-specific binding/internalization in the presence of 100 μM AMD3100. Each experiment was performed in triplicate, and results are means ± SD