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. 2011 May 3;6(5):e19035. doi: 10.1371/journal.pone.0019035

Figure 4. Schematic representation of contact region between calpain and substrate sequence.

Figure 4

Domain II is the protease domain of calpain, while domain III binds Inline graphic. Amino acid sequences of domain III are less conserved than those of domain II, which are highly conserved not only between Inline graphic- and m-calpains but also among all calpain family members.