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Mass Spectrometry Forum Discuss and post questions about LC-MS, Q-STAR, MALDI-TOF, and other Mass Spectrometry Questions in the Mass Spec Forum.


Mass Spectrometry Score and Ranking

Mass Spectrometry Score and Ranking - Mass Spectrometry Forum

Mass Spectrometry Score and Ranking - Discuss and post questions about LC-MS, Q-STAR, MALDI-TOF, and other Mass Spectrometry Questions in the Mass Spec Forum.


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Old 04-01-2011, 03:45 AM
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Default Mass Spectrometry Score and Ranking



hi everyone,
I have got a list of Mass Spec data from 2 different in-solution digested samples and I would like to compare them and make a statement about the different protein present. In sample#1 137 proteins could have been identified and in sample#2 228. I numbered the proteins, which I call ranking. The proteins are pretty much all the same, but in different positions with different scores. I ranked the proteins by just numbering them from 1 to n. What does it means if Protein A is at Rank 7 in Sample#1 and Rank 27 in Sample#2, but is scored with 83.2 in Sample#1 and 103.36 in Sample#2. Can I tell anything about it's abundance in sample#1 vs #2 by looking at Rank and Score? What do the Scores exactely tell me?

Would be sooo great if anyone could give me a hint THX!
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Old 10-28-2011, 09:46 AM
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Default Re: Mass Spectrometry Score and Ranking

on this subject, I recommend go to the site bioproximity[dot]com
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