The authors replied as follows:

The Text Should Read as Follows:

The text should read as follows: The predicted mass up to, but not including the C-term amino acid, is 4,019.85 if the protons for three disulfide bonds are subtracted. The difference between the measured unprotonated mass of 4,092.9 and the latter (4,019.85) is 73.05, which is the mass of a glycine-amide. The mass accuracy of the MALDI-MS analysis is approximately 6 0.1 D with internal calibra...

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