Content of the repository: - Pulse_parameters.xlsx All pulse parameters for assignment and dynamics spectra recorded in this study. - Scripts_submission.zip Code to fit overall tumbling from 15N-TRACT experiment, as well as the analysis of anisotropic tumbling. Fits of 3Q relaxation to measure order parameters. Calculations and correlations of sovent accessible surface area. Investigation of potential artefacts by external protons. All as described in supplementary section S2. - FLYA_runs.zip All ablation and addition runs in FLYA as described in supplementary section S1, as well as an example FLYA run for the assignment of C-detected spectra with H-detected inputs. - spectra_Bruker.zip All raw assignment and dynamics spectra used in this study, including pulse sequences (Bruker format). - Titration_data.zip Spectra and peaklists of the oxamate titration.