Used in cancer research and diagnostics to identify and isolate cancer stem cells, particularly in brain, colon, and liver cancers. Binds specifically to the CD133 antigen, enabling flow cytometry, immunohistochemistry, and cell sorting applications. Supports development of targeted therapies and is utilized in studies assessing tumor initiation, drug resistance, and disease progression. Also employed in stem cell research for characterizing normal and malignant stem cell populations.