As far as I know no. But I might be wrong. 

Sent from my iPhone

On 03/set/2012, at 07:20, Leonard Foster <[email protected]> wrote:

> Hi all
> 
> I haven't found an answer to my question on this Group or the
> SpectraST wiki. Thus, I suspect the answer is 'no' but if not, I'm
> hoping someone here can tell me.
> 
> The question is, if the spectra for a particular isotopically labelled
> form of a peptide does not exist in the spectral library but a
> differently labelled form does, can/does SpectraST adapt the spectra
> to what would be expected? For example, if LLAGTK (no label) exists in
> the spectral library but you have a SILAC-labelled sample (with normal
> Lys and D4-Lys) containing LLAGTK, can the algorithm do two searches,
> one a direct comparison and the second where all Y-ions are shifted by
> 4 Da?
> 
> Thanks
> 
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