This family of antimicrobial peptides is found in nematodes [1-3].

1: ASABF, a novel cysteine-rich antibacterial peptide isolated from the nematode Ascaris suum. Purification, primary structure, and molecular cloning of cDNA. Kato Y, Komatsu S; J Biol Chem. 1996;271:30493-30498. PMID:8940016

2: In vitro antimicrobial properties of recombinant ASABF, an antimicrobial peptide isolated from the nematode Ascaris suum. Zhang H, Yoshida S, Aizawa T, Murakami R, Suzuki M, Koganezawa N, Matsuura A, Miyazawa M, Kawano K, Nitta K, Kato Y; Antimicrob Agents Chemother. 2000;44:2701-2705. PMID:10991847

3: abf-1 and abf-2, ASABF-type antimicrobial peptide genes in Caenorhabditis elegans. Kato Y, Aizawa T, Hoshino H, Kawano K, Nitta K, Zhang H; Biochem J. 2002;361:221-230. PMID:11772394