In 2008, the biological activity of 64Cu-CB-TE2A-sstr2-ANT, where ANT is Phe-4-NO2-c(d-Cys-Tyr-d-Trp-Lys-Thr-Cys)-d-Tyr-NH2 (Fig. 14), was assessed in in vitro and in vivo studies in a tumour-bearing rat model [64]. This evidence concerns the gene SSTR2 and neoplasm.