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A close view of the S2 pockets of falcipain-3 (green) and falcipain-2 (blue; Sabnis et al. 2002). Differences in residues are presented as a space-filled model, whereas other important residues are shown as solid sticks. Cysteines are colored yellow while Glu243 (in falcipain-3) and Asp234 (in falcipain-2) are shown in red.
