Table 2.

Crystallographic structures of fish trypsins

Enzyme	Species	X-ray resolution (Å)	PDB code	References
Trypsin isoform 1 Trypsin isoform 2 Trypsin isoform 3	Chum Salmon (Oncorhynchus keta)	1.9 1.75 1.55	2ZPQ 2ZPR 2ZPS	Toyota et al. (2009)
Trypsin	Chum Salmon (Oncorhynchus keta)	1.8	1MBQ	Toyota et al. (2002)
Trypsin I	Atlantic salmon (Salmo salar)	1.83 1.53 1.7 1.5	1UTJ 1UTK 1UTL 1UTM	Leiros et al. (2004)
Trypsin I	Atlantic salmon (Salmo salar)	1.0	1HJ8	Leiros et al. (2001)
Anionic salmon trypsin in complex with squash seed inhibitor (Cucurbita pepo trypsin inhibitor II) Anionic salmon trypsin in complex with squash seed inhibitor (Cucurbita maxima trypsin inhibitor I)	Atlantic salmon (Salmo salar)	1.8	2STB 2STA	Helland et al. (1999)
Anionic salmon trypsin in complex with bovine pancreatic trypsin inhibitor	Atlantic salmon (Salmo salar)	2.1	1BZX	Helland et al. (1998)
Trypsin	Atlantic salmon (Salmo salar)	1.7	1A0 J	Schrøder et al. (1998)
Trypsin	Atlantic salmon (Salmo salar)	1.83	1BIT	Berglund et al. (1995)
Trypsin	Atlantic salmon (Salmo salar)	1.8	2TBS	Smalas et al. (1994)
Trypsin-1	Atlantic cod (Gadus morhua)	1.85	2EEK	Unpublished