"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 occuring 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.

Enter list of
precursor ion
m/z values
Upload a peaklist
Choose at least one ion adduct with appropriate polarity
Positive mode
All Positive Ions
Negative mode
All Negative Ions
Neutral mass
Note: This option is for testing/QC purposes only.
Specify Mass Tolerance (+/- m/z):
Specify Chains:     All chains     Even chains only
Optionally restrict search by lipid category/class
Fatty Acyls [FA]
All Fatty Acyl Classes
Fatty acids/esters (FA)
Acyl carnitines (CAR)
Acyl CoAs (CoA)
N-acyl ethanolamines (NAE)
N-acyl taurines (NAT)
Glycerolipids [GL]
All Glycerolipid Classes
Tri(acyl|alkyl)glycerols (TG)
Di(acyl|alkyl)glycerols (DG)
Mono(acyl|alkyl)glycerols (MG)
Monogalactosyldiacylgylcerols (MGDG)
Monogalactosyldiacylgylcerols (DGDG)
Sulfoquinovosyldiacylglycerols (SQDG)
Glycerophospholipids [GP]
All Glycerophospholipid Classes
Glycerophosphocholines (PC)
Glycerophosphates (PA)
Glycerophosphoserines (PS)
Glycerophosphoethanolamines (PE)
Glycerophosphoglycerols (PG)
Glycerophosphoinositols (PI)
Glycerophosphoinositol phosphates (PIP)
Cardiolipins (CL)
Bis(monoacylglycero)phosphates (BMP)
Sphingolipids [SP]
All Sphingolipid Classes
Sphingoid bases (SPB)
Sphingoid base phosphates (SPBP)
Ceramides (Cer)
1-O-acyl ceramides (ACer)
Ceramide phosphates (CerP)
PI-ceramides (IPC)
PE-ceramides (EPC)
Sphingomyelins (SM)
Hexosyl ceramides (HexCer)
Mannosyl-PI-ceramides (MIPC)
Mannosyl-di-PI-ceramides (M(IP)2C)
Dihexosyl ceramides (Hex2Cer)
Sulfatides (SHexCer)
Glycosphingolipids (Various)
Sterol Lipids [ST]
All Sterol Lipid Classes
Sterols, inc. bile acids (ST)
Cholesterol esters (CE)
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