In order to overcome the limitation of CG models and compare directly CG simulations with experiments, we propose here to re-introduce hydrogen atoms based on the positions of the beads during post-processing. The latter is achieved via RCG, and has been successfully used previously to reconstruct molecules with different levels of complexity , as well as to generate X-ray scattering data from CG lipid simulations . The NMR relaxation rate R 1 was then extracted from the G-CG simulation trajectories with re-introduced hydrogens, which we refer to as G-CG-H (Fig. ). Our results with G-CG-H show an excellent agreement with the experimental results of Ref. (Fig. ). The offset in R 1 between the G-CG and G-CG-H models is about a factor of 6, similar to the offset measured between CoM-CG and AA models (Fig. ).