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(A) Ribbon diagram of bovine ubiquitin (PDB: 1UBQ) 43; (B) circular dichroism spectra of ubiquitin in 50 mM ammonium acetate solution in the absence of TFE (black line) and with 15% TFE added (dashed line); (C) ESI‐MS spectrum of ubiquitin in 50 mM aqueous ammonium acetate solution.
