Experiment Testing virus region 8 (VR8) mutant cross-species compatible Adeno Associated Viruses (ccAAVs) in mice. Experiment Condition AAV9 GFP Assay Description: Relative neuronal transduction levels were quantified by counting the number of transduced neurons, identified based on morphology, for each brain region per 50um sagittal section Tissue Measured: cerebral cortex Cell Type : neuron Measurement Type: Delivery Efficiency Record ID 15000000363 Editor Delivery System Delivery System Subtype Guide Vector AAV9-GFP ; Model Species Mouse Model Name C57BL/6 Application Method intravenous Application Site Dosage 5e13 vg/kg Injection Frequency once Injection Rate Injection Volume 200 microliters Days post injection 4 weeks Editor Format AAV vector encoded Antidote Id Antidote Description Measured Values Samples Size: 3   Replicate Result (Delivery Efficiency) Measurement Units: # of cells in 50um Section Mean 162.0  1 110  2 180  3 196

Representative image of AAV9 GFP delivery in brain cerebral cortex. Neuronal and astrocytic expression were visualized by immunohistochemical staining.