Kinetic schemes and equilibrium constants for WT (upper panel) or super-active GluN1-E698C/GluN2B-L795C (lower panels) receptors. Records were analyzed at equilibrium. Ligand-binding steps are shown in gray. Note that for simplicity, long-lived desensitized steps are not shown. *P<0.05 relative to WT GluN1/GluN2B (two-tailed Student"s t-test, unpa 