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The Allen Cell Types Database provides multimodal single cell characterization data to enable data-driven approaches to cell type classification.
From the API, you can:
NWB 
Download electrophysiology data in Neurodata Without Borders (NWB) format
Download computed electrophysiology features
Download images of cell morphology images
Download morphological reconstructions in SWC format
Download computed morphology features
Download neuronal models trained on this data set
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