Cover Feature: Structures of Gas‐Phase Hydrated Phosphotyrosine Revealed by Soft X‐ray Action Spectroscopy (Chem. Eur. J. 10/2025)

The Cover Feature illustrates a study on hydrated phosphotyrosine in the gas phase. In their Research Article (DOI: 10.1002/chem.202403665), J. Leroux, S. Bari and co-workers explain how, by combining synchrotron radiation tuned to the oxygen core—shell energy with tandem mass spectrometry, they identified the most favorable position adopted by a single water molecule on the protonated amino acid. Their integrated experimental and theoretical approach revealed that the water molecule bridges the phosphate and carboxyl groups, effectively stabilizing the overall structure.