Closed (left) and open (right) time histograms for WT (upper panels) or super-active GluN1-E698C/GluN2B-L795C (lower panels) receptors. Closed time histograms were best fit with 5 exponentials, whereas open time histograms were best fit with 2 exponentials (see Online Methods and Appendix Fig S8). Smooth lines are associated exponential fits 