TABLE 3.

Factor Analysis of correlations in expression between glutamatergic genes

Protein	Gene	Factor 1	Factor 2	Factor 3	Factor 4	Factor 5	Factor 6	h2
AMPA	GRIA1	0.61	0.29	0.44	0.15	−0.05	−0.02	0.68
AMPA	GRIA2	0.96	−0.01	0.24	0.07	−0.07	0.07	0.99
AMPA	GRIA3	0.87	−0.08	0.33	−0.05	−0.07	0.16	0.90
AMPA	GRIA4	0.56	0.64	0.06	−0.01	0.26	0.12	0.82
Kainate	GRIK1	0.10	0.69	0.18	−0.09	0.23	−0.01	0.58
Kainate	GRIK2	0.26	0.90	0.01	−0.03	−0.09	0.08	0.89
Kainate	GRIK3	0.61	0.13	0.34	−0.05	0.21	0.63	0.95
Kainate	GRIK4	0.42	0.19	0.62	0.28	0.00	0.03	0.68
Kainate	GRIK5	0.31	0.18	0.81	0.04	0.14	−0.08	0.81
NMDA	GRIN1	0.49	−0.04	0.70	−0.15	0.24	0.14	0.83
NMDA	GRIN2A	0.87	0.03	0.18	−0.06	0.05	0.36	0.92
NMDA	GRIN2B	0.47	−0.04	−0.01	−0.03	0.00	0.55	0.53
NMDA	GRIN2C	−0.33	0.87	−0.08	0.17	−0.15	−0.06	0.92
NMDA	GRIN2D	0.02	0.14	0.08	−0.04	0.94	0.06	0.92
NMDA	GRIN3A	0.77	−0.08	0.23	0.06	0.20	0.17	0.72
Metab Gp I	GRM1	0.11	0.91	0.07	−0.06	0.35	0.01	0.96
Metab Gp I	GRM5	0.85	−0.09	0.17	0.10	0.32	0.11	0.88
Metab Gp II	GRM2	0.46	0.02	0.74	−0.18	0.13	0.28	0.88
Metab Gp II	GRM3	0.19	−0.15	0.37	0.67	0.02	0.00	0.64
Metab Gp III	GRM4	−0.19	0.96	−0.01	−0.03	−0.05	−0.01	0.97
Metab Gp III	GRM7	0.66	0.08	0.41	−0.11	0.59	0.00	0.97
Metab Gp III	GRM8	0.71	−0.08	0.39	−0.16	0.04	−0.06	0.70
Transporter	SLC1A1	0.68	0.03	0.28	−0.01	0.64	0.02	0.96
Transporter	SLC1A2	−0.01	−0.13	−0.08	0.89	−0.01	−0.01	0.82
Transporter	SLC1A3	−0.13	0.14	−0.13	0.88	−0.08	−0.04	0.83
Transporter	SLC1A6	−0.17	0.88	0.10	−0.05	−0.02	−0.03	0.82
	Variance	0.29	0.20	0.13	0.09	0.09	0.04

Gene loadings ≥ 0.5 for each factor are identified by bold font h2 = the communality estimate i.e. the proportion of the variance of that variable that the factor accounts for.