I'm trying to learn how to search through protein mass spectra data and just finished reading through a nice guide at
However, I'm still trying to learn how to accomplish a simple task. Specifically, I'd like to filter for protein sizes by looking only at small proteins/peptides with a specific number of amino acids. Does anyone have any good ideas on how to accomplish this?
So are you saying that if I want to filter for residue number then I need to download the sequences of every spectrum of interest?