wow, the link was exactly what i was looking for. thanks a lot!

On 9월23일, 오전7시51분, David Shteynberg <[email protected]>
wrote:
> Yes, that is what n_instances means.  This link is a bit old but might
> still be helpful:
>
> http://tools.proteomecenter.org/formats.php
>
> On Mon, Sep 21, 2009 at 9:16 PM, NIKI <[email protected]> wrote:
>
> > hi, i need to extract some information from my protXML files, but
> > there are some fields whose meaning is not clear to me.....
>
> >         <peptide peptide_sequence="IITHPNFNGNTLDNDIMLIK" charge="3"
> > initial_probability="0.9990" nsp_adjusted_probability="0.9992"
> > peptide_group_designator="b" weight="1.00"
> > is_nondegenerate_evidence="Y" n_enzymatic_termini="2"
> > n_sibling_peptides="14.75" n_sibling_peptides_bin="4" n_instances="21"
> > exp_tot_instances="19.98" is_contributing_evidence="Y"
> > calc_neutral_pep_mass="2282.1727">
>
> >  here what exactly 'n_instances' mean? to me it seems to be total #
> > of spectra corresponding to the peptide.. am i right? plz help me!

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