Figure 2.

Calbindin labeled migratory GABAergic interneurons in the E13.5 mouse preplate. Migratory interneurons, labeled by GAD67 promoter-driven GFP expression, were seen to leave the ventral forebrain in their way to the pallium, following well-defined migratory pathways at rostral (A) and more caudal levels (B). CB immunoreactivity co-localized with EGFP in only part of the GAD67-GFP interneurons. Boxes represent CB⁺ cells for comparison, at the lower intermediate zone (A′,B′,B″) and in the preplate (B″). CB did not label pioneer neurons in mice. Note CB immunostaining at the pia (see Meyer et al., 1998). LIZ, lower intermediate zone; MZ, marginal zone. ppl, primordial plexiform zone or preplate. Photomontages of single confocal sections. Calibration bar: 100 μm.