16.2 unique group filter

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