massxpert 3.2.2-1 (amd64 binary) in ubuntu quantal

 massXpert is a program to simulate and analyse mass spectrometric
 data obtained on linear (bio-)polymers. It is the successor of GNU
 polyxmass.
 .
 Four modules allow:
  - making brand new polymer chemistry definitions;
  - using the definitions to perform easy calculations in a desktop
    calculator-like manner;
  - performing sophisticated polymer sequence editing and simulations;
  - perform m/z list comparisons;
 .
 Chemical simulations encompass cleavage (either chemical or
 enzymatic), gas-phase fragmentations, chemical modification of any
 monomer in the polymer sequence, cross-linking of monomers in the
 sequence, arbitrary mass searches, calculation of the isotopic
 pattern...