All reagents and solvents used were ACS reagent grade or better. Full AAV capsid serotypes derived from Spodoptera frugiperda Sf9 cells and produced using the cytomegalovirus-green fluorescent protein (CMV-GFP) construct were purchased from Virovek (Hayward, CA, USA) along with their empty capsid counterparts collected from the same production batch. Serotypes purchased were AAV6, AAV8, and AAV9. ZipChip High Resolution (HR) chips (Cat# 810-00140) and ZipChip Peptides Kits (Cat# 810-00167) containing ZipChip Peptides BGE were obtained from 908 Devices (Boston, MA, USA).