Chemryt - Search by Structure helps chemical search

Specview - Chemryt Informatics
Peptide Sequence:
Add to N-term:
Add to C-term:
Fixed Modifications: [ADD]
    Variable Modifications: [ADD]
    Residue position in the sequence is 1-based.
    Enter a comma-separated list of positions if multiple positions in the sequence have the same modification.
      Spectrum Peaks:
      Enter one m/z, intensity pair on a single line.

      283.751526 6.493506
      287.601379 11.096813
      295.031097 2.801403

      Use Sample Data