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MALDI-TOF mass spectrum of an in-solution trypsin digestion of luminal contents extracted from the pyriform gland of L. hesperus. Peptide ions from the protein PySp1 are labeled with #, with the exception of peptide ion 995.5. Trypsin autolysis peptide signals are labeled with an asterisk. The spectrum was recorded using a CHCA matrix and the instrument was operated in reflectron mode.
