To test in vivo specificity of [99mTc]Tc-ZAC12*-ZAC12*-GGGC and [99mTc]Tc-ZAC12*-ZTaq_3-GGGC, the tumour accumulation in B7-H3-positive SKOV-3 xenografts and in B7-H3-negative Ramos xenografts was compared (Fig. 8 and Supplemental Table 3). The gene discussed is CD276; the disease is neoplasm.