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a) Lattice packing of two molecules of hERG PAS domain. The molecules are related by 2 fold crystallographic axis indicated by arrow. b) Packing of two molecules in the asymmetric unit of the mEAG PAS domain. The two molecules have a ∼2-fold relation that is roughly perpendicular to page. In both panels the two molecules on the right are shown in a similar orientation. Residues from the hydrophobic patches are shown as stick.
