Table 4. Area of the accessible surface interface between Iripin-5 and the tested proteases, the number of hydrogen bonds and the number of salt bridges formed (from PDBePISA; Krissinel & Henrick, 2007 ▸).

Protease	Surface interface (Å2)	No. of hydrogen bonds	No. of salt bridges
Proteinase 3	892.8	13	10
Human neutrophil elastase	733.6	8	4
Trypsin	919.5	12	10
α-Chymotrypsin	787.5	7	1
Cathepsin G	947.1	8	4
Chymase	849.8	5	6