Alanine|Bacterial Proteins|Computer Simulation|Crystallography, X-Ray|Energy Transfer|Ion Channel Gating|Methanobacterium|Models, Chemical|Models, Molecular|Motion|Mutagenesis, Site-Directed|Potassium Channels|Potassium Channels, Calcium-Activated|Potassium Channels, Inwardly Rectifying|Protein Interaction Domains and Motifs|Protein Structure, Secondary|Protein Subunits|Streptomyces lividans|Structure-Activity Relationship