HNF1A and post-traumatic stress disorder: Furthermore, TT homozygotes of the HNF1A rs735396 polymorphism had the highest levels of the GP27 (A3G3S3), GP35 (A4F1G3S3) and GP39 (A4F1G4S4) N-glycans and nominally higher levels of GP33 (A4G4S3) N-glycan in the patients with PTSD, whereas CC homozygotes had the lowest levels (Table 4, Figure 3 and Figure 5).