Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13550-015-0123-1/MediaObjects/13550_2015_123_Fig1_HTML.gif)
PARP1 immunofluorescence staining of brain, U251 MG xenografts, and U87 MG xenografts. a Representative images showing H&E staining (left) and PARP1 immunofluorescence staining (right) of each tissue type. b Percent of nuclei positive for PARP1 for each tissue type. c Average intensity of nuclei in each cell type