Interestingly, 9.64 ± 0.87%ID PSMA+ PC3-Pip tumor uptake wasobserved for [89Zr]PEG-(DFB)3(ACUPA)1, which was significantly higher (**P < 0.01)than the uptake (6.69 ± 1.24%ID) obtained for [89Zr]PEG-(DFB)1(ACUPA)3. The gene discussed is PIP; the disease is neoplasm.