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Developmental changes in GLT-1 promoter activity. Fluorescent images showing the expression of eGFP in sagittal sections of brain tissue from GLT-1–eGFP BAC transgenic mice collected at postnatal days 1, 11, 25, and 39. The composite images show the entire section, reconstructed from multiple images. Scale bars: for composite images, 2 mm; for all other images, 300 μm.
