Shorthand notation for Glycerolipids (GL)

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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


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
MG (358)
MG 18:0
MG 18:0
MG 18:0
MG 0:0/18:0/0:0

MG (344)
MG O-18:0
MG O-18:0
MG O-18:0
MG 0:0/O-18:0/0:0

DG (594)
DG 34:1
DG 34:1
DG 16:0_18:1
DG 16:0/18:1/0:0
DG 16:0/18:1(9Z)/0:0
DG (580)
DG O-34:1
DG O-34:1
DG O-16:0_18:1
DG O-16:0/18:1/0:0
DG O-16:0/18:1(9Z)/0:0
DG (538)
DG 30:1
DG dO-32:1
DG O-16:0_O-16:1
DG O-16:0/O-16:1/0:0
DG O-16:0/O-16:1(9Z)/0:0
TG (858)
TG 52:2
TG 52:2
TG 16:0_18:1_18:1
TG 16:0/18:1/18:1
TG 16:0/18:1(9Z)/18:1(11Z)
TG (844)
TG O-52:2
TG O-52:2
TG O-16:0_18:1_18:1
TG O-16:0/18:1/18:1
TG O-16:0/18:1(9Z)/18:1(11Z)
TG (830)
TG 50:2
TG dO-52:2
TG O-18:1_O-16:0_18:1
TG O-18:1/O-16:0/18:1
TG O-18:1(9Z)/O-16:0/18:1(9Z)
TG (816)
TG O-50:2
TG tO-52:2
TG O-18:1_O-16:0_O-18:1
TG O-18:1/O-16:0/O-18:1
TG O-18:1(9Z)/O-16:0/O-18:1(9Z)

$ m is the uncharged molecular mass
§ Annotation based on assumption of even numbered carbon chains only

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