Next, additional cell lines undergoing apoptosis were tested with FITC-P17, including K-562 (human chronic myelogenous leukemia), MDA-MB-231 (human breast adenocarcinoma), Hela (human cervical adenocarcinoma) and HUVEC (human umbilical vein endothelium) treated with TRAIL, THP-1 (human acute monocytic leukemia) and DU4475 (human breast carcinoma) treated with camptothecin, and H9c2 (rat myocardium) treated with hydrogen peroxide, in the attempt to demonstrate the potency of P17 as an in vitro apoptosis-imaging probe. The gene discussed is TNFSF10; the disease is acute monocytic leukemia.