UCHL1, a neuronal protein associated with protein degradation and neuroprotection, also shows higher levels in PTSD patients, with the Past PTSD ≤ 5 y group at 30.54 ng/mL (IQR 19.92–36.16), the Past PTSD > 5 y group at 11.18 ng/mL (IQR 6.38–16.69), and the No PTSD group at 3.98 ng/mL (IQR 3.04–4.67). This evidence concerns the gene UCHL1 and post-traumatic stress disorder.