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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Curr Opin Struct Biol. 2016 Oct 20;43:28–37. doi: 10.1016/j.sbi.2016.10.006

Fig. 1.

Fig. 1

Protein folding, binding, and droplet formation inside a cell. “Test” proteins are volume-excluded from but also weakly bind to bystander macromolecules in the cellular environment, and these interactions can steer folding and binding stability in complex ways. Test proteins (either unstructured or structured) can also weakly interact among themselves, and form a new, droplet phase in the cellular environment.