"Bulk" Structure Searches

Search COMP_DB with a List of Precursor Ions

The LIPID MAPS® Database of computationally-generated "bulk" Lipid Species (COMP_DB) is a virtual database composed of major classes of lipid species, generated from a list of commonly occurring acyl/alkyl chains. These "bulk" lipid species indicate the number of carbons and number of double bond equivalents, but not chain positions or double bond regiochemistry and geometry. Search results are based on theoretical considerations. It is highly recommended to validate formation and intensity of adduct ions in the individual setup. This should be done using authentic lipid standards.

If users prefer to search on a list that is more applicable to plasma or cells, then LMSD bulk Structure Search is recommended.

Step 1

Provide a list of m/z values.

OR
Peaklist file should contain a single column of m/z values as shown in the textarea on the left.

Step 2

Choose at least one ion adduct with appropriate polarity

Positive Mode
Negative Mode
Neutral Mass
Note: This option is for testing/QC purposes only.

Step 3

Step 4

Fatty Acyls [FA]
Glycerolipids [GL]
Glycerophospholipids [GP]
Sphingolipids [SP]
Sterol Lipids [ST]

Step 5