A key step in mass spectrometry (MS)-based proteomics is the identification of peptides in sequence databases by their fragmentation spectra. Here we describe Andromeda, a novel peptide search engine ...
I could be totally off but I'm thinking this: four different suits. 1/4th chance to pick a certain suit. or 13/52 = 1/4th take one away from that 13 and now the chances of a second card of that suit ...
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