Annotation of isotope-labelled lipids

  • Isotope containing lipid structures are indicated in square brackets annotating the isotope, followed by the number of isotopic atoms, e.g. FA 18:1[13C5].
  • Multiple isotopes are separated by a comma, e.g. FA 18:1[13C5,D4].
  • When positions of isotopes are known, they are indicated in a separate pair of parentheses in front of the isotope number, e.g. FA 18:1[(14,15,16,17,18)13C5].
  • Isotopes in other structures are indicated in square brackets after class shorthand abbreviation, e.g. PC[D9] 34:1, TG[13C3] 54:3.
  • Isotopes in fatty acyls/alkyls are indicated in square brackets after the number of DBE, e.g. PC 34:1[D9], PC 16:0_18:1[13C5].
  • Isotopes present in either fatty acyls/alkyls and/or other structures are indicated in square brackets in front of class shorthand abbreviation, e.g. [D5]PC 34:1, [13C7]TG 54:3.