TACR2 and neoplasm: Although tumor genesis is a complex process about which our knowledge is still limited, the high expression levels of SERPINB9 (SERPINB9, Fc.: 11.37×) and TACR2 (TACR2, Fc.: 8.84×) [73,97], two proteins associated with tumor formation, supports the potential role of C. jejuni in the development of these pathological conditions.