Spin relaxation times measured here are sensitive to the rotational dynamics of peptide backbone N-H bonds, yet these dynamics depend indirectly also on conformations sampled by the peptides. Therefore, spin relaxation times are potential proxies also for conformational ensembles of peptides which is the case for example for partially disordered proteins. To investigate if spin relaxation times could be useful to characterize peptide conformations also in the micellar environment, we analyzed correlations between peptide helicity and spin relaxation times in Fig. .