Anti-CD133 antibodies are useful reagents for the immunodetection of the target protein, CD133. The CD133 protein is a reported synonym for the human gene PROM1, encoding prominin 1. The full-length protein is 97,202 daltons in mass with 7 identified isoforms. This protein is reported to contain sites of glycosylation. The CD133 antigen is a documented cancer, neural and hematopoeietic stem cell marker.