GYKI-53405, also known as LY 293606, is a noncompetitive AMPA receptor antagonist. GYKI-53405 binds specifically to Xenopus brain membranes with KD and Bmax values of 4.5 microM and 35 pmol mg-1 protein respectively. Binding is increased in the presence of Mg2+ and is unaffected by AMPA or kainate.
