Figure 2
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1756-9966-33-24/MediaObjects/13046_2014_Article_758_Fig2_HTML.jpg)
HFF, Met5A, HCT116 and MSTO colony formation capacity upon CF treatment. Five hundred viable cells, pretreated for 48 h with CF (1:200) and CNTRL, were allowed to grow in normal medium for 10-14 days and then stained by crystal violet solution. The image is representative of three independent experiments.