title: Unimod: Protein modifications for mass spectrometry.
abstract: 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.
authors.affiliation: Matrix Science Ltd., London, UK.
authors.forename: David M
authors.initials: DM
authors.lastname: Creasy
authors.forename: John S
authors.initials: JS
authors.lastname: Cottrell
mesh_terms: D016208:Databases, Factual; D020407:Internet; D013058:Mass Spectrometry / Q000379:methods*; D011499:Protein Processing, Post-Translational; D011506:Proteins / Q000737:chemistry / Q000378:metabolism*; D020539:Sequence Analysis, Protein; D009626:Terminology as Topic
chemical_list: D011506:Proteins