METLIN Gen2 is by far the most comprehensive MS/MS database. Like the original Scripps’ METLIN, METLIN Gen2 is available as a cloud-based resource with 860,000 molecular standards, MS² at 4 different collision energies in pos/neg ionization modes, new filters, MGF file searching, neutral loss searching and similarity ranking.

• Searchable MS² data in both positive & negative ionization modes, at multiple collision energies, now comes as searchable composite spectra which brings together the MS² data from the multiple collision energies into one spectrum.
• New filters to include or exclude molecules you may not be interested in, such as peptides, drugs, toxicants, and/or halogenated species.
• MGF file batch searching that is enabled with above filters.
• A new Neutral Loss library exclusive to METLIN Gen2 and generated from all 860,000 molecular standards, this also includes a MS² to NL converter, which allows you to convert your spectra from “Intensity vs m/z” to “Intensity vs Δm/z” for searching the full Neutral Loss library.