Immunofluorescence analysis of p-c-Jun in micrometastatic (day 7) and macrometastatic (day 21) nodules in a xenograft mouse model injected intravenously with MDA231-LM2 cells. DAPI was used to stain cell nuclei, and cancer cells express GFP as a marker. Scale bar, 50 μm. Quantification of p-c-Jun+ cancer cells 