Inter-subunit crosslinking:
(TM1) and cysteines in TM2 and TM3 of β2 subunit. A. GABA responses after DTT and Cu++:Phen application (EC50 GABA were used]. *p< 0.05, ***p< 0.001 versus Cys-less receptor; two-way ANOVA, and Bonferroni post-tests (n= 6). B. The three amino acids are shown in the model, along with the respective Cα-Cα distances, as seen from the membrane, between β2 and α1 subunits.