By exploiting the ability of the diaminopropionic acid (Dap)-Asp-Cys chelator to bound and stabilize the [99mTc][TcO]3+core Kularatne and coworkers described a series of PSMA-targeting agents for PCa imaging (Table 5, [99mTc][TcO]1–6) [116]. The gene discussed is FOLH1; the disease is posterior cortical atrophy.