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Cooperative Binding
Figure 7
Cartoon representation of the protein calmodulin in its two conformations: “closed” on the left (derived from PDB id: 1CFD) and “open” on the right (derived from PDB id: 3CLN).
The open conformation is represented bound with 4 calcium ions (orange spheres).
doi: https://doi.org/10.1371/journal.pcbi.1003106.g007