A recent study using single-cell RNA-sequencing showed in the human-specific granular layer of the PFC 6 schizophrenia-related genes associated with synaptic transmission, cell development and differentiation (Met proto-oncogene, receptor tyrosine kinase, MET; Neurogranin, NRGN; parvalbumin, PVALB; retinoic acid receptor β, RARB; thymocyte expressed, positive selection associated 1, TESPA1; and zinc finger matrin-type 4, ZMAT4). This evidence concerns the gene PVALB and schizophrenia.