Table 1.

List of the 30 highest expressed mRNAs of GPCRs in murine DRGs

	Gene	Receptor name	Target copies/ng cDNAa	Ratio (target/Gapdh)b
1	PTGER3	EP3 receptor	2658.4	25.8
2	ADRA2C	Adrenoceptor α2C	2603.7	22.1
3	GPR88	G-protein-coupled receptor 88	2000.8	25.9
4	ADRA2A	Adrenoceptor α2A	1828.4	15.4
5	GPR153	G-protein-coupled receptor 153	1790.7	16.2
6	ADRB1	β1-Adrenoceptor	1613.9	13.6
7	BLTR2	BLT2	1257.5	11.6
8	PTGER1	EP1 receptor	823.9	8.9
9	OXTR	Oxytocin receptor	812.6	7.3
10	TAS1R1	Taste receptor type 1 member 1	768.7	10.2
11	NPFFR1	Neuropeptide FF receptor 1	758.1	6.8
12	FZD8	Frizzled class receptor 8	758.1	10.8
13	FZD5	Frizzled class receptor 5	650.9	8.7
14	BLTR	BLT1	642.0	5.9
15	GPR62	G-protein-coupled receptor 62	615.8	5.8
16	ADRA1D	α1D-Adrenoceptor	590.7	5.4
17	CRHR2	Corticotropin-releasing hormone receptor 2	547.4	7.4
18	GPR26	G-protein-coupled receptor 26	539.8	5.2
19	GPR25	G-protein-coupled receptor 25	525.1	4.8
20	ADRB3	β3-adrenoceptor	510.7	4.3
21	GPR137B	G-protein-coupled receptor 137B	473.2	6.1
22	GPR54	Kisspeptin receptor	453.9	4.3
23	LGR6	Leucine-rich repeat-containing GPCR6	450.8	4.9
24	Vmnr2r54	Vomeronasal receptor	447.7	4.8
25	FZD7	Frizzled family receptor 7	435.4	5.8
26	HTR6	5-Hydroxytryptamine receptor 6	429.4	4.3
27	GPR135	G-protein-coupled receptor 135	429.4	5.5
28	DRD4	Dopamine receptor D4	414.8	3.5
29	P2Y4	Pyrimidinergic receptor P2Y4	403.5	4.4
30	DRD5	Dopamine receptor D5	392.4	3.3

^a Total RNA was isolated from DRGs of untreated adult mice and subjected to semiquantitative RT-PCR. The data are corrected for target copies/ng cDNA.

^b The relative expression of GPCR genes expressed as ratio between copy number of target/ng cDNA and copy number of Gapdh/ng cDNA.