Injection site immunofluorescence labeling for (a) Syp-mCherry, along with (b) GFP and (c) Cre recombinase from the PB of case 1803. Panels (d–f) show pairwise combinations of Syp-mCherry, Cre, and GFP, with all three combined in (g). Scale bars are 100 μm in panels (f; also applies to a–e) and (g). Panels (h–j) show in situ hybridization labeling for Calca mRNA (i, ice blue) with Syp-mCherry immunofluorescence (h) in PBeL from the injection site of a Calca-Cre mouse (case 4181). Scale bar in (j) is 50 μm (also applies to h–i).