EPCAM and carcinoma: Endothelial glycoprotein‐2 (EGP‐2), is overexpressed in most carcinomas.29 Gelonin has been covalently linked to MOC31 (an antibody recognising EGP‐2) and has been used in several cancer models.29, 37, 39 A PCI‐based synergy was found between gelonin and two photosensitisers (TPPS2a and AlPcS2a), with a greater effect seen with the targeted MOC31‐gelonin in a small cell lung carcinoma cell line (NCI‐H146).