Among these six plasma N-glycans, four (GP14 = A2G2S1, GP27 = A3G3S3, GP33 = A4G4S3, GP39 = A4F1G4S4) were significantly higher, whereas two (GP16 = FA2G2S1, GP19 = M9) were significantly lower in PTSD subjects compared to controls in both cohorts (Figure 1). Here, CD151 is linked to post-traumatic stress disorder.