Protein Ki-67 immunolabeled in (left) sham cortex and (right) stroke peri-infarct alongside the homeostatic microglial marker P2Y12. P2Y12 intensity is visualized on a continuous scale with black/blue representing low, green average, and yellow/white high expression (scale right). Inset is higher resolution of the white box (scale bars: large image, 100 m and inset, 50 m).