In hPANX1-deleted HEK293T cells, receptor-activated currents are evoked in hexameric and heptameric concatemers with intact intersubunit linkers. (A and C) Whole-cell recordings of PE-activated, CBX-sensitive currents in α1DAR-expressing hPANX1-deleted HEK293T cells cotransfected with concatenated hexameric (A) and heptameric (C) hPANX1 channels; exemplar ramp I-V curves and time series of peak current at +80 mV (insets). (B and D) Quantification of the peak CBX-sensitive current density (pA/pF) from hexameric (B) and heptameric (D) hPANX1 concatemers under the indicated conditions. Statistical analysis by ANOVA with Tukey’s multiple comparisons test. Note that PANX1-like currents developed even when the intersubunit linkers were intact (i.e., when the pipette did not contain TEVp).