Abstract: A method is provided for identifying sequences of molecules and sequence modifications from mass spectrometry data. At least one de novo sequence is produced from mass spectrometry data of sequences of molecules,. At least one mass-based alignment is calculated between each de novo sequence and sequences in a sequence database. The molecular masses of molecules in the de novo sequence are compared to molecular masses of molecules in each sequence in the sequence database. Mass differences of modification sites are interpreted between the sequence in the sequence database and the de novo sequence that have been identified by the mass-based alignment as modifications identified in a modification catalog. At least one match score for the mass-based alignment is calculated that provides an indication of matching between the sequence in the sequence database and the de novo sequence. Sequences in the sequence database are identified from mass-based alignments in response to the match scores.

Abstract: A method and system for monitoring availability of a plurality of units is provided. A list is maintained identifying the plurality of units, including a notation to indicate whether each unit is unavailable. An electronic identification of a particular one of the units is accepted, from which it is determined whether the list includes the notation that the particular unit is unavailable. If it does include that notation, the list is automatically modified to remove the notation. If it does not include the notation, information is collected to specify unavailability of the particular unit.