New Features in NIST MS Search version 2.0g (May 2011 release)
What's New in the NIST MS Search Program v.2.0g
Search for the exact mass value in the NIST/EPA/NIH Mass Spectral Databases or any User Database and use of the accurate or exact mass as a search constraint.
Search for exact fragment ion mass values in NIST 11 Databases mainlib, replib, and nist_msms.
Display of the exact mass with any spectrum that has an associated elemental composition (chemical formula).
Optional columns in Hit Lists containing the number of Synonyms and the number of Other Databases in which the Hit appears. The Hit List can be sorted according to the values in these columns.
Managing and searching as many as 127 separate mass spectral databases instead of 16, which was the limit in previous versions.
Up to 1,048,560 spectra in a single database instead of 786,420 spectra allowed in the previous versions.
Import spectra from mzXML and mzData MS and MS/MS files (in addition to mgf, msp, dta, pkl, JCAMP, etc.)
Option to turn off homolog hits in a Structure Similarity Search.