ZAP70 and staphylococcus aureus infection: The eQTL-regulated gene pathways in AA cases vs GAIN controls also yielded allograft rejection, as well as Interferon Gamma Signaling, Staphylococcus aureus Infection, Graft vs Host, Autoimmune, Translocation of ZAP-70 (a surface membrane protein expressed in T cells and natural killer cells) [49] and MHC class II Antigen Presentation (Figure 5A).