Figure 3 - full size

 

Figure 3.
Figure 3 Selected active-site details. Putative hydrogen-bonding interactions (green dashed lines) between papain (sticks coloured C black, O red, N blue, S yellow) and the peptide fragments derived from TbICP (sticks coloured C orange, O red, N blue) are depicted. The OD1, OD2 and OD3 atoms associated with the sulfonic acid group of Cys25 are labelled 1, 2 and 3, respectively; water molecules are shown as red spheres and labelled W.

The above figure is reprinted from an Open Access publication published by the IUCr: Acta Crystallograph Sect F Struct Biol Cryst Commun (2006, 62, 504-508) copyright 2006.