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Comparison of procathepsin L and B. Structural representation of the procathepsin L (orange) (PDB ID: 1CS8) ERFNIN (red) and GNFD (blue) motifs are shown. The prodomain of cathepsin B (cyan) (PDB ID: 1MIR) with GNFD-motif (blue), occluding loop (purple), and long carboxy terminus (green) are mentioned in the structure.
