An 85% reduction in the average uptake of [68Ga]Ga-TacBOMB2 in PC-3 tumor xenografts was observed with the co-injection of [D-Phe6,Leu-NHEt13,des-Met14]Bombesin(6–14), confirming its specific uptake in tumors (Figure 7 and Table S4). The gene discussed is GRP; the disease is neoplasm.