| KcsA | potassium channel from Streptomyces lividans |
| 1–125 KcsA | KcsA deletion that lacks the cytoplasmic 125 to 136 residues |
| OPEN | H25R, R117Q, E120Q, R121Q, R122Q and H124Q sextuple mutant channel |
| DDM | dodecyl β-d-maltoside |
| TM | transmembrane segment |
| SDS–PAGE | sodium dodecyl sulfate–polyacrylamide gel electrophoresis |
| tm | midpoint denaturation temperature (in degrees Celsius) |
| Tm | midpoint denaturation temperature (in kelvins) |
| ΔH0 | enthalpy change upon protein unfolding in the absence of ligand |
| KD | dissociation constant |
| TBA+ | tetrabutylammonium cation |
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