Remarks
XCMS Online: a web-based platform to process untargeted metabolomic data. // You have also access to IsoMetlin. The isoMETLIN Metabolite Database is a database designed for isotope-based metabolomics. Specifically, isoMETLIN facilitates the identification of metabolites incorporating isotopic labels. isoMETLIN enables users to search all computed isotopologues (>1 million) derived from METLIN on the basis of mass-to-charge values and specified isotopes of interest, such as 13C or 15N. //
Given the ongoing security and resource challenges of hosting METLIN academically, after ~20 years of service we have transitioned MS/MS data searching to a commercial (AWS) site, METLIN Gen2 https://massconsortium.com/. Aspects of METLIN's searching capabilities will remain intact. However, through an exclusive arrangement with Scripps, the new METLIN Gen2 subscription site will host new capabilities and data on 860,000 molecular standards (60 times bigger than the METLIN.scripps.edu site)