Keywords: EPR spectroscopy; in-cell studies; nitroxide labels; protein structural dynamics; site-directed spin labeling EN EPR spectroscopy in-cell studies nitroxide labels protein structural dynamics site-directed spin labeling 1 1 1 11/29/22 20221125 NES 221125 B Messages from the cell b : The cover picture honors the sensitivity of nitroxide labels combined with EPR spectroscopy in reporting on protein structure dynamics inside bacterial cells. Cover Feature: Probing the Structural Dynamics of a Bacterial Chaperone in Its Native Environment by Nitroxide-Based EPR Spectroscopy (Chem. Eur. J. 66/2022) EPR spectroscopy, in-cell studies, nitroxide labels, protein structural dynamics, site-directed spin labeling. [Extracted from the article]