DLGAP2 and post-traumatic stress disorder: For instance, DNA methylation of Disks Large-Associated Protein (Dlgap2) gene that encodes a postsynaptic density protein is increased in hippocampus region of animals that display an PTSD-like phenotype but not in non-PTSD-like rats following the predator stress paradigm (Chertkow-Deutsher, Cohen, Klein and Ben-Shachar, 2010).