The evolutionary history of topological variations in the CPA/AT transporters
Fig 2
Comparison between PSE_1 (Reentrant-helix-reentrant fold-type) and 2HCT (CPA-reentrant fold-type).
The brown dots represent the localization of the membrane a) An example of an internal symmetry with two reentrant helices (2HCT:5a1s). b) PSE_1 model. c) Superposition between the models of PSE_1 (red) and the 2HCT structure (blue).