Figure 5From: Requirement of ATM-dependent pathway for the repair of a subset of DNA double strand breaks created by restriction endonucleasesEffect of ATM inhibitor on foci formation. Synchronized normal human diploid cells in G1 were electroporated with Pvu II (100 U) as described in METHODS, and they were incubated for 2 hours before fixation. KU55933 (20 μM) was administrated 30 minutes before electroporation, and the cells were incubated with a medium containing KU55933 after electroporation.Back to article page