The scripts for the bond order parameter analysis are freely available at NMRlipids GitHub (github.com/NMRlipids) and the analyzed trajectories are permanently freely available at Zenodo (zenodo.org [ppm] At full hydration, C-H bond order parameters S CH for OPLS4 seem to follow closely previously acquired OPLS3e data in headgroup, glycerol and tail segments, and the accuracy seems indistinguishable between these force fields at full hydration for POPC (Fig. ).