小中大peptide filter:
Cross-correlation score > 1.5, 2.0 and 2.5 for charge states +1, +2 and +3, respectively; Delta Correlation >0.1; Primary Score >200; Ranking of the Primary Score <3; and percent fragment ions >30%.
Protein: 2 peptide match, reasonable MW and PI.
一个点多个蛋白是很正常的事情。