The CPKSNNGVC was designed to specifically target the monocarboxylate transporter 1 (MCT1) which was overexpressed in series of CRC cells, such as the Caco-2, HCT 116, and HCT-15, while not the normal non-cancer cells (Ferreira et al., 2019). The gene discussed is SLC16A1; the disease is colorectal carcinoma.