Shorthand notation for Glycerolipids (GL)
From LipidomicsWiki
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Revision as of 12:45, 28 October 2015
Rules for the annotation
- Shorthand notation: Lipid class abbreviation followed by number of C-atoms:number of double bonds.
- Fatty acids linked to the glycerol are known:
- separator _: sn-position of the fatty acids is not known
- separator /: sn-position of fatty acids is proven (order sn-1/sn-2/sn-3 for GL; sn-1/sn-2 or sn-2/sn-3 for GP); no FA linked 0:0
- Other bond types than ester bonds are indicated as follows in front of the sum of C-atoms or fatty acid:
- O = proven O-alkyl-bond (it is important to note that “O” after the number of carbons designates a keto bond)
- P = proven O-alk-1-enyl-bond (acid-sensitive ether bond in “plasmalogens”).
- More than one "non"-ester bond is indicated in front of the bond type as d for di, t for tri.
Lipid class abbreviations
- Monoglycerides - MG
- Diglycerides - DG
- Triglycerides - TG
Examples
Bond type | Lipid class level mass# | Lipid species level* | Bond type level | Fatty acyl/alkyl level | Fatty acyl/alkyl position level | LIPID MAPS Fatty acyl/alkyl structure level |
---|---|---|---|---|---|---|
Acyl | MG (358) | MG 18:0 | MG 18:0 | MG 18:0 | MG 0:0/18:0/0:0 | |
Alkyl | MG (344) | MG O-18:0 | MG O-18:0 | MG O-18:0 | MG 0:0/O-18:0/0:0 | |
Diacyl | | | | | | |
Alkyl-acyl | | | | | | |
Dialkyl | | | | | | |
Dialkyl | | | | | | |
Alkyl-diacyl | | | | | | |
Dialkyl-acyl | | | | | | |
Trialkyl | | | | | | |