PROM1 and colorectal cancer: Previous reports on CD133-imaging probes include a zirconium-89 labeled commercially available humanized anti-CD133 antibody, [89Zr]-DFO-AC133.1, which was administered to CD133 expressing human colorectal cancer xenograft BALB/c nu/nu mice at a dose of 1.85 MBq (30 μg).