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Comparison of peptide mass fingerprint from samples A and B using destructive sampling (lower spectra) and noninvasive eZooMS sampling (top spectra). (A) For one sample, the resulting peptide mass fingerprint detected fewer peaks than in its equivalent eZooMS sample. (B) In the other sample, the results obtained were very similar for both methods. eZooMS samples extracted and analyzed 12 mo apart, having been stored at room temperature, revealed no loss of signal.
