“…The DSF analysis clearly demonstrated a highly increased thermal stability of the toxoids and was confirmed by thermal stability measurements using CD. Previous studies using protein fluorescence spectroscopy in combination with guanidine-HCl 15, 16 or differential scanning calorimetry 18 also confirm an increased stability of the toxoids compared with the toxins. However, to our knowledge, this is the first time DSF was applied in measuring a change in T m , used as surrogate parameter for protein stability, between toxins and toxoids.…”