A few examples:
1. the bi-lobal monomeric aspartic proteinase, pepsin, and the dimeric HIV proteinase which possesses similar activities.
2. porphobilinogen deaminase
3. calmodulin, free and bound to a helical peptide
Gerstein, Lesk and Chothia describe many more examples of domain movements involved in induced fit binding.
M. Gerstein, A.M. Lesk and C. Chothia (1994). Structural mechanisms for domain movement in proteins. Biochemistry, 33, 6739-6749.
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