text: In membranes from HEK293 cells transfected with << alpha2-receptors >>, etomidate inhibited binding of the alpha2-antagonist, [[ [3H]RX821002 ]], with higher potency from alpha2B- and alpha2C-receptors than from alpha2A-receptors (Ki alpha2A 208 microm, alpha2B 26 microm, alpha2C 56 microm).