Internalization of FITC-labeled IMT-P8-KLA in various human tumor cells (HeLa, MDA-MB-231 and PC3 cells) was monitored by incubating the cells with IMT-P8-KLA and KLA alone (2.5 μM) for 30 min at 37 °C followed by flow cytometry analysis. The gene discussed is KL; the disease is neoplasm.