COL6A3 and schizophrenia: Differentially expressed proteins did not correspond to DEGs in cortical neurons derived from monozygotic twins from pairs discordant for schizophrenia, with the exception of downregulation of COL6A3 and COL6A3 (Fig. 2g), which was the most robust finding in gene expression in comparison between ST vs. unaffected female twins, and which showed a nominal p-value of 6.9 × 10−3 in corresponding proteomic analyses.