“…The NK-lysin gene was initially cloned and characterized from humans, but its significance was unrealized until its orthologue was identified from porcine natural killer cells and cytotoxic T lymphocytes as an antimicrobial peptide (Manning et al, 1992;Houchins et al, 1993;Andersson et al, 1995). In recent years, extensive research has been conducted for the analysis of structure and antimicrobial activities of NK-lysin (Stenger et al, 1998;Ernst et al, 2000;Gansert et al, 2003;Jacobs et al, 2003).…”