BAIAP2L1 and post-traumatic stress disorder: In 429 male soldiers from the United States and the Netherlands, Katrinli et al. [16] identified cytosine-phosphate-guanine (CpG) sites near the genes F2R, CNPY2, BAIAP2L1, and TBXAS1 to be associated with risk of PTSD within military personnel prior to and following deployment.