Table 1.

Summary of tdTomato expression in P2rx4 tdTomato reporter mice in relation to P2X4 mRNA in past studies^a

	P2rx4 tdTomato (current study)	P2X4 mRNA Collo et al., 1996	P2X4 mRNA Allen Brain Atlas
Olfactory bulb
Mitral cells	++	++	++
Glomerular layer	++++	NA	+++
Anterior olfactory nucleus	+	+	+
Cerebral cortex
Motor cortex	+	+	+
Piriform cortex	++	++	++
Frontal cortex	+	++	+
Subcortical telencephalon
CA1-CA4	+	++	++
Dentate gyrus	—	++	++
Cerebellum
Purkinje cells	+	+++	+++
Molecular layer	+++	+	+
Hypothalamus
Suprachiasmatic nucleus	+++	++	++
PVN	+++	NA	++
Medial preoptic nucleus	+	+	+
Medial preoptic area	+	++	+
Supraoptic nucleus	+++	++	++
Ventromedial nucleus	++	+	++
Arc	++++	+	++
Thalamus
Mediodorsal nucleus	+	+	+
Ventrolateral nucleus	+	+	+
Reticular nucleus	++	+	+
Midbrain
Supramamillary nucleus	++	++	++
Medial mammillary nucleus	++	+	+
Hindbrain
Locus ceruleus	+++	NA	++
Ventral pontine reticular nucleus	+	++	+
Caudal pontine reticular nucleus	+	+	+
Solitary tract nucleus	++	+	+
Trigeminal nucleus	++	NA	+
Ventricular structures
Ependymal layer (tanycytes)	+++	—	++
Subfornical organ	+++	+	++
Subcommisural organ	+++	NA	+++

^aExpression levels are indicated on a semiquantitative scale, where — indicates absence, and the number of crosses (+) indicates relative expression levels. NA, specific dataset does not exist. The data from the Allen Brain Atlas are freely available at http://mouse.brain-map.org/experiment/show/75551474.