AgTx2	agitoxin 2
GFP	green fluorescent protein
MgTx	margatoxin
HgTx1	hongotoxin 1
ChTx	charybdotoxin
ScyTx	scyllatoxin
TEA	tetraethylammonium
IC50	a concentration of a competing ligand that displaces 50% of the fluorescent probe from the complex with the receptor
Kd	dissociation constant of GFP–MgTx
Kap	apparent dissociation constant of non-labeled ligand determined in the competitive binding experiment
Iav	average fluorescence intensity of GFP–MgTx bound at a surface of a spheroplast expressing KcsA–Kv1.3
Iavs	Iav value at saturated binding of GFP–MgTx
Im	Iav value at zero concentration of a competing ligand in the competitive binding experiment