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:

  1. Protein A
    • peptide a
    • peptide b
  2. Protein B
    • peptide e
    • peptide f
  3. Protein A, B
    • peptide b
    • peptide c

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