Broad telencephalic expressed genes. A: Glutamate receptor ionotropic AMPA 3 (GRIA3) is more uniformly expressed across most telencephalon cell populations, except in the primary sensory intercalated pallium populations (IH and IN) and the pallidum (P). B: Glutamate receptor ionotropic AMPA 2 (GRIA2) has a similar pattern as GRIA3, except the medial striatum has lower expression. C: Glutamate receptor ionotropic NMDA 3A (GRIN3A) has a similar pattern, except that IH has similar expression as the rest of the telencephalon. D: Glutamate receptor ionotropic NMDA 2B (GRIN2B) has a similar pattern, except that IN has similar expression as the rest of the telen-cephalon. E: Glutamate receptor ionotropic kainate 5 (GRIK5) has a similar pattern as GRIN1, except it is much lower in the pallidum. F: Glutamate receptor ionotropic NMDA 1 (GRIN1) is the main subunit to which most NMDA subunits bind, and consistent with this, it is expressed at high levels in all six major telencephalic populations. G: Glutamate receptor ionotropic kainate 4 (GRIK4) also has similar pattern as GRIN1, except it has variable expression in more lateral regions (see Supporting F1). H: Glutamate receptor metabotropic 3 (GRM3) also has a similar pattern as GRIN1, except with lower expression in Area X and some nuclei of IN (L2 and E, see Supporting F1). I: Paired box gene 6 (PAX6) transcription factor in contrast is not expressed throughout most of the telencephalon, except low levels in the telencephalic ventricle zone and LSt of the striatum. Sets of serial sections are in the Supporting database folder. Scale bar = 1 mm.