The search page provides a “unique group option” as shown in the figure below (-ug parameter in DTASelect).
With this filter, a protein keeps only unique peptides. Further, this filter assign shared peptides to their redundant proteins.
This is an example.
Protein A has peptides a, b, c, d.
Protein B has peptides b, c, e, f.
Peptide a and d are unique to protein A, while peptide e and f are unique to protein B. Peptide b and c are shared peptides by protein A and B.
After this filter, the results become like this:
- Protein A
- peptide a
- peptide d
- Protein B
- peptide e
- peptide f
- Protein A, B
- peptide b
- peptide c