An astrocyte contacting a cortical capillary. The astrocyte is labelled with a genetically expressed green fluorescent protein (green) and immunolabeled for glial fibrillary acidic protein (red) with overlap shown in yellow; neurons are immunolabelled for microtubule associated protein (magenta); Nuclei are marked with DAPI (blue). The endfeet of the astrocyte demarcate the capillary.