Inh-C neurons also had increased expression of metabotropic glutamate receptors GRM3 and GRM8 in schizophrenia compared to controls (Fig. 3H and Supplementary Table 14), associated with the GO term ‘glutamate receptor activity’ (Supplementary Fig. 7D), and decreased expression of potassium voltage-gated channel interacting protein 4 (KCNIP4) and GABA-receptor subunit gamma 3 (GABRG3) (Fig. 3H and Supplementary Table 14). Here, GRM3 is linked to schizophrenia.