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mass spec!

mk_2007
in Biochemistry and Molecular Biology

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Hi! I have just done a maldi tof- maldi tof tof, and am trying to calculate the b and y ions from the spectra. I have found an amino acid which is almost perfect except one thing! I get a peak corresponding to a tyrosine residue for y ions, but nowhere can i see one for b ions! can anyone suggest why this might be? x

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