Fresh frozen brains from MetEGFP mice were cryosectioned at 16μm and processed according to a commercially available RNAscope Multiplex Fluorescent Assay Kit (Advanced Cell Diagnostics, Hayward, CA) as described previously (Kast, Wu, Williams, Gaspar, & Levitt, 2017 (link)). RNAscope probes used in this study include: Met (cat# 405301), Gfp (cat# 400281), and Chat (cat# 410071).