Comparison of the distances observed by paramagnetic relaxation enhancement NMR (squares) on spin labeled troponin C (site 136) from (Cordina et al., 2014) and the distances calculated for the most prevalent conformation of the label from SS simulations (circles). On the left, comparison of the same NMR distances with the distances for canonical rotamers mmmtt, pmptt, tmmtt. The sum of differences for the canonical rotamers was 70,137,100 Å as compared to 37 for SS found solution.