Fig. 6

Interaction patterns presented in the context of protein structures. a F1 is represented in the crystal structure of the complex formed between bovine beta-trypsin and MCTI-A, a trypsin inhibitor of squash family (PDB id 1F2S). Residues in gray represent protease residues and the ones in orange represent inhibitor residues. Oxygen and nitrogen atoms are shown in red and blue respectively. b F2 is represented above in the kunitz type trypsin inhibitor complex with porcine trypsin (PDB id 4AN7). The oxyanion hydrogen bonds are depicted by red dashed lines, while the yellow ones represent the other hydrogen bonds that compose the F2