Table 1.

Proteases isolated from fish skin mucus

Proteases	Species	Function	References
Cathepsin D	Mucus surface of cat fish	Regulate production of parasin I	Cho et al. (2002a)
Serine proteases	Epidermal cell layer of Japanese eel/dorsal surface of European eel	Bacteriolytic activity against fish pathogen	Aranishi (1999); Aranishi (2000)
Amino proteases	Epidermal cell layer of Japanese eel/dorsal surface of European eel	Bacteriolytic activity against fish pathogen	Aranishi (1999); Aranishi (2000)
Amino peptidase	Epidermal cell layer of Japanese eel/dorsal surface of European eel	Bacteriolytic activity against fish pathogen	Aranishi (1999); Aranishi (2000)
Cathepsin B	Epidermal cell layer of Japanese eel/dorsal surface of European eel	Bacteriolytic activity against fish pathogen	Aranishi (1999); Aranishi (2000)
L-like proteases	Epidermal cell layer of Japanese eel/dorsal surface of European eel	Bacteriolytic activity against fish pathogen	Aranishi (1999); Aranishi (2000)
Metello proteases	Epidermal cell layer of Japanese eel/dorsal surface of European eel	Bacteriolytic activity against fish pathogen	Aranishi (1999); Aranishi (2000)
Trypsin like proteases	Rainbow trout/Atlantic salmon	Bacteriolytic activity against the Gram-negative fish pathogen/act against salmon louse	Firth et al. (2000)