FKBP5 and schizophrenia: Subsequent analysis of FKBP5 gex in the excitatory neuron sub-clusters showed that this increase was specific to the Exc_L2-3 cluster representing LII–III excitatory neurons, with a striking + 37% higher FKBP5 gex in these neurons in schizophrenia vs controls (t = 3.256, P = 0.00186, FDR = 0.0093, Fig. 4d, i).