A 2,5-hidroxybenzoic acid matrix-assisted laser desorption/ionization matrix cocrystallized with a fluorescein isothiocyanate-conjugated peptide. The sample was created by Ben Katz, a proteomics specialist at the University of California, Irvine, to improve resolution and lower background noise. Follow Ben on Twitter @ProteinMassSpec.
Credit: Nicole Green, Iowa State University, USA.
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