Average 3J(HN,Hα) and 2J(N,Cα) scalar constants for simulations of ALA5 in the TIP4P-Ew solvent model. These constants are calculated with the original DFT1 (black), DFT2 (purple), and original Karplus (orange) parameters, respectively. Experimental scalar values are plotted in each graph in blue. Error bars are calculated from the average difference between two simulations.