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  • Title: An improved method for the analysis of Cryptosporidium parvum oocysts by matrix-assisted laser desorption/ionization time of flight mass spectrometry.
    Author: Glassmeyer ST, Ware MW, Schaefer FW, Shoemaker JA, Kryak DD.
    Journal: J Eukaryot Microbiol; 2007; 54(6):479-81. PubMed ID: 18070325.
    Abstract:
    Cryptosporidium parvum oocysts were analyzed using matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS). Sample preparation proved to be a crucial step in the acquisition of acceptable mass spectra. Oocysts of C. parvum and the matrix were mixed and held for at least 45 min to produce reproducible, representative mass spectra. Sporozoites were also excysted from oocysts, purified, and analyzed using MALDI-TOF MS. The mass spectra of the intact oocysts contained many of the same peaks found in the mass spectra of the sporozoites, suggesting that during analysis, the internal constituents, not just the oocyst wall, are ablated by the laser.
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