Have you ever just ran into a funny differential peptide that seems really interested and thought ".....awesome...where do I even start to figure out what that is....?" I sure have! And before you try to figure out if you can export that single spectrum for de novo (eek!) or hand sequencing with a calculator (double eek!) what if you could just have a starting point?
Don't feel like reading? Check out this hosted web instance of it here!
You just type in your m/z or mass and give it a mass tolerance window and it pulls up all of the peptides in UniProt that could match. Obviously, better mass accuracy ends up with a smaller list, but what if it's up- in one condition by like 5x and the first hit is another protein from your results that is also up 5x? Mystery solved! Maybe you're not that lucky, but what a neat and helpful new tool to help you get going. It has other powers, but this is the one I liked the most when playing with it. You can also download it locally where you can change the databases and stuff.
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