Dominant negative effects of 62GA, 61GA, and 61GS on SUR2B + Kir 6.2
current. (A) Whole-cell current traces recorded from
cells transiently transfected with SUR2B + Kir 6.2 (WT), SUR2B + Kir
6.2 + 62GA (62GA), SUR2B + Kir 6.2 + 61GA (61GA), or SUR2B + Kir 6.2 +
61GS (61GS) under the control conditions (5 min after breakin), in the
presence of diazoxide (300 μM) and glibenclamide (10 μM),
respectively. The pipette solution (see Methods) was
supplemented with 3.0 mM ATP. (B) Summarized data for
the currents measured at −100 mV. P < 0.01,
one-way ANOVA. (C) Mean measured currents at −100 mV
recorded from cells transiently transfected with Kir 2.1–His6 and
cotransfected with Kir 2.1–His6 and the indicated Kir 6.0 constructs
(5 min after breakin).