The molecules that mostly contributed to discriminate schizophrenia from control were: VGluT2, EAAT2, GAD67, d-Asp/total Asp, d-Ser, PSD-95, GRIA1 and GRM5 whereas the ones that barely contributed to the discrimination were: l-Gln/l-Glu ratio, d-Ser/total Ser, EAAT1, GRIN2A and Gly (Fig. 4a). This evidence concerns the gene GRM5 and schizophrenia.