Antibacterial peptides, also known as antimicrobial peptides
or natural antibiotics, are encoded by specific genes in a variety
of biological cells, and are broad-spectrum polypeptides with
applications including anti-bacterial, anti-fungal, anti-virus, tumor
cells, etc . They area class of small molecular peptides with 10-
50 amino acids, most of which are cationic, and are widely found
in organisms, including bacteria, fungi, plants, insects, fishes,
birds, crustaceans, amphibians and mammals.