I'm pretty sure it indicates m/z error of the matched peak with the theoretical
m/z. I'm not sure what the ^3 means though.
-Matt
On 11/25/2010 9:32 PM, GATTACA wrote:
Hello.
Can someone explain to me the syntax in of the peaklists as they are
reported in the SpectraST *.sptxt file?
I understand that the *.sptxt file is a text version of the binary
*.splib file.
For instance, consider this snippet from the *.sptxt file I created
from some searched results.
147.1406 92.5 y1/0.03,y4-35^3/-0.61,y4-36^3/-0.28
157.9838 197.0 b5-35^3/-0.43,b5-34^3/-0.76
182.0084 129.3 y3^2/-0.09
187.1618 112.0 y5-17^3/0.39,y5-18^3/0.71
192.9816 360.4 y5^3/0.53,a4^2/0.86,b6-45^3/-0.45
206.2740 321.2 b4^2/0.16
213.0517 195.2 y2-35/-0.07,y2-36/0.91
223.2085 118.6 ?
I interpret the '?' to mean an unmatched peak to the peptide.
Now in the first line of the above example (y1/0.03, y4-35^3/-0.61,
y4-36^3/-0.28). Is this indicating that this peak corresponds to the
first y-ion? or y-ion#4 ? What does the value after the slash mean?
Any and all help is appreciated.
Thanks
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