The specificity of 10D7 for CDCP1 expressing CRC cells in vivo was further confirmed by results showing that signal from xenograft tumors was 78% lower in mice coadministered unlabelled 10D7 and 89Zr-10D7 compared with mice administered only 89Zr-10D7 (Figure 2(e); Table S1). Here, CDCP1 is linked to colorectal carcinoma.