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. 2012 Dec;140(6):599–612. doi: 10.1085/jgp.201210844

Figure 2.

Figure 2.

A mechanism that can fit results with heteromeric glycine receptors. A Jones-Westbrook type of mechanism adapted for the heteromeric glycine receptor, with three binding sites. Three extra shut states are postulated, distal to open states (red). Although they are denoted as the D conformation (green), they bear no obvious relationship to macroscopic desensitization in this case. Rate constants are marked in black for each transition, and equilibrium constants are marked in brown. The values are means of fits to three sets of data, taken from Table 4 of Burzomato et al. (2004). Note that equilibrium constants for each set were averaged, rather than calculated from the averaged rate constants. Therefore, the ratio of the mean rate constants will not generally be the same as the mean equilibrium constant, especially when the scatter between sets is large (e.g., for D1).