Neonatal rat hippocampal tissue slice double-labeled with Sytox (to label all cell nuclei; red) and IB4 lectin (to label microglia and, incidentally, blood vessels; green).

See:  Kurpius et al.,  "Purines Induce Directed Migration and Rapid Homing of Microglia to Injured Pyramidal Neurons in Developing Hippocampus." Glia.  2007 55:873-884.

Image by Dana Kurpius.

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