Figure 1

Example lineshape simulation and fitting GUIs. Shown are GUIs for the 2- and 3-state models. GUIs for the 4-state model are shown in Supporting Information Fig. S1. Each GUI is an independent single-window application. Example parameters are filled in and can be used for quick simulation or fitting. User-provided values enable customized simulations or fittings of NMR lineshape data.