Phosphorylated fraction of H2AX as a measurement for DNA damage in cancer cells and potential applications of a novel assay. oleh Jiuping Ji, Yiping Zhang, Christophe E Redon, William C Reinhold, Alice P Chen, Laura K Fogli, Susan L Holbeck, Ralph E Parchment, Melinda Hollingshead, Joseph E Tomaszewski, Quentin Dudon, Yves Pommier, James H Doroshow, William M Bonner