Unimod: Protein modifications for mass spectrometry

Proteomics. 2004 Jun;4(6):1534-6. doi: 10.1002/pmic.200300744.


Unimod is a database of protein modifications for use in mass spectrometry applications, especially protein identification and de novo sequencing. It contains accurate and verifiable values, derived from elemental compositions, for the mass differences introduced by both natural and artificial modifications.

MeSH terms

  • Databases, Factual*
  • Internet
  • Mass Spectrometry / methods*
  • Protein Processing, Post-Translational
  • Proteins / chemistry
  • Proteins / metabolism*
  • Sequence Analysis, Protein
  • Terminology as Topic


  • Proteins