Table 2.

Classes of antimicrobial peptide (Ashley et al. 2018)

Class	Peptide	Source
Anionic	Maximin H5 Dermicidin	Amphibians Humans
Linear Cationic α-helical	Cecropins (A) Andropin Moricin Ceratotoxin Melittin	Insects
Enriched with specific amino acid (cationic)	Proline containing abaecin Tryptophan containing indolicidin	Honeybee Cattle
Anionic & cationic containing cysteine with disulfide bonds	2-disulfide bridges (protegrin) 3-disulfide bridges (α-defensins)	Pigs Human (HNP-1*, HNP-2, Cryptidins)
Anionic & cationic peptide fragments	Lactoferricin Casocidin I Bovine α-lactalbumin antimicrobial domain, Haemoglobin, lysozyme, ovalbumin	Lactoferrin Human casein Bovine, human

^*: Human Neutrophil Peptides