NK-2 ( Antibiotic NK 2), a shortened linear amphipathic NK-Lysin analog (comprising residues 39 to 65 of NK-lysin), is an antimicrobial peptide that exhibits potent activities against trypanosoma cruzi , Candida albicans , gram-positive and gram-negative bacteria. NK-2 can kill trypanosomes residing inside the human glioblastoma cell line 86HG39, left the host cells apparently unharmed.