"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 bonds, 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
OR
Upload a peaklist
Choose at least one ion adduct with appropriate polarity
Positive mode
All Positive Ions
[M+H]+
[M+H-H2O]+
[M+Na]+
[M+NH4]+
[M+K]+
[M+2H]2+
[M+2Na]2+
[M+2Na-H]+
Negative mode
All Negative Ions
[M-H]-
[M+Cl]-
[M+HCOO]-
[M+OAc]-
[M-CH3]-
[M-2H]2-
[M-3H]3-
Neutral mass
Note: This option is for testing/QC purposes only.
Neutral
Specify Mass Tolerance (+/- m/z):
Specify Chains:     All chains     Even chains only
Optionally restrict search by lipid category/class
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)
Sphingolipids [SP]
All Sphingolipid Classes
Ceramides/Sphingoid bases (Cer/Sph)
Cer/Sph-1-phosphates (CerP/S1P)
PI-ceramides(PI-Cer)
PE-ceramides(PE-Cer)
Sphingomyelins (SM)
Hexosyl ceramides (HexCer)
Mannosyl-PI-ceramides (MIPC)
Mannosyl-di-PI-ceramides (M(IP)2C)
Lactosyl ceramides (LacCer)
Sulfatides (SHexCer)
Fatty Acyls [FA]
All Fatty Acyl Classes
Wax esters (WE)
Fatty acids (FA)
Acyl carnitines (CAR)
Acyl CoA's (CoA)
N-acyl ethanolamines (NAE)
N-acyl taurines (NAT)
Sterols [ST]
Cholesteryl esters (CE)
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