Robuta

https://pmc.ncbi.nlm.nih.gov/articles/PMC4001770/ Aromatic–aromatic interactions between residues in KCa3.1 pore helix and S5 transmembrane segment... Interactions between aromatic amino acid residues in the pore helix and S5 transmembrane domain control gating of the Ca2+-activated potassium channel KCa3.1. transmembrane segmentinteractionsresiduesporehelix