Table 1.

Classes of antimicrobial peptides based on structure [29].

Cat.	AMP	Structure	Source	Ref.
α-helical peptides	Aurerin 1–2	Amidated C-terminus	Frogs	[30,31]
	Melittin	Amidated C-terminus	Bees	[32]
	Brevinin 1	-	Frogs	[33]
	Maculatins	Amidated C-terminus	Frogs	[34]
	Citropin	Amidated C-terminus	Frogs	[35]
	Buforin II	-	Toad	[36]
	Cathelicidins			[37]
	(LL-37	Amidated C-terminus	Human
	BMAP-27,28,34	-	Bovine
	Magainins	-	Frogs
	Cecropin)	Amidated C-terminus	Insect
β-sheet peptides	Cathelicidins (Protegrins Bactenecin) Defensins	Cysteine-rich Disulphide forming loop	Pigs Bovine Mammals	[37]
	Tachyplesins and Polyphemusin	Three disulphide bonds Cysteine/arginine-rich and amidated C-terminus	Horse Crab	[32,38,39,40]
			Horse Crab	[41]
Extended structure	Cathelicidins (PR-39 Tritrpticin Indolicidin Crotalicidin 15–34)	Proline and arginine-rich Tryptophan and arginine-rich Tryptophan and amidated C-terminus Lysine rich	Pigs Pigs Bovine Snakes Humans	[37]
	Histatins	Histidine-rich and amidated C-terminus		[42]