Fig. 3
From: Stromal-epithelial responses to fractionated radiotherapy in a breast cancer microenvironment
Relationship between metabolic activity and surface area in MCF-7 cells. Absorbance from an MTT assay for a sample with an initial plating density of 20,000 cells/μl. Absorbance was measured on days 0, 3, and 5 days for MCF-7 cells versus the area occupied by these cells at the same times using IF stained images (INSET). Error bars indicate one standard error of the mean (SEM)