Characterization of GIRK2-expressing cells in the postnatal (P10) cerebellum of Pax2-GFP mice. Double labelling between GIRK2 (red), and Pax2-GFP (green). Pax2 is a transcription factor selectively expressed by cerebellar interneuron precursors, and during neonatal development. Pax2-GFP immunofluorescence strongly and selectively labelled neurons in the molecular layer, internal granule cell layer and white matter.