The tumor-to-blood ratios provided by ZIGF1R:4551-GGGC at this time point (6.2 ± 0.9 and 6.9 ± 1.03, for DU-145 and MCF-7, respectively) (Table 3) were on the same level or better than 111In-labeled (Fab′)2-fragments of anti-IGF-1R antibody R1507 at 24 h after injection (7.5 ± 1.4 and 2.4 ± 0.4 in SUM149 and EW-5 xenografts, respectively) (Heskamp et al. 2012; Fleuren et al. 2013). This evidence concerns the gene IGF1R and neoplasm.