Table 6.
Multifaceted identification of bovine brain lipid species by LipidXplorer
| Lipid class a | Number of identified species | Number of signature ions | FA b | FAO b | HG b | NL b | MS c |
|---|---|---|---|---|---|---|---|
| PC | 13 | 4 | X Xd | X | X | ||
| PC-O | 17 | 4 | X | X | X | X | |
| LPC | 4 | 3 | X | X | X | ||
| Cer | 3 | 2 | X X | ||||
| CL | 10 | 1 | X | ||||
| LCL | 2 | 2 | X X | ||||
| DAG | 13 | 1 | X | ||||
| PE | 22 | 3 | X X | X | |||
| PE-O | 35 | 3 | X | X | X | ||
| LPE | 4 | 2 | X | X | |||
| PG | 10 | 3 | X X | X | |||
| PI | 13 | 4 | X X | X | X | ||
| PS | 10 | 4 | X X | X | X | ||
| SM | 7 | 2 | X | X | |||
| TAG | 25 | 1 | X |
aMFQL queries identifying species of these lipid classes are presented in Additional file 15. bFA, acyl anions of fatty acid moieties; FAO, product of the neutral loss of a fatty acid moiety from sn-2 position of the glycerol backbone; HG, fragment of the head group specific for all species of the same lipid class; NL, neutral loss of a fragment specific for all species of the same class; MS, precursor mass. cTwo X symbols indicate that precursor species of this class are detected in two molecular forms (for example, deprotonated ion and acetate adduct), or as doubly and singly charged ions. dTwo X symbols indicate that two signature ions of the same type are observed (for example, two acyl anions of both fatty acid moieties). Cer, ceramides; CL, cardiolipins; DAG, diacylglycerols; LCL, triacyl-lysocardiolipins; LPC, lysophosphatidylcholines; LPE; lyso-phosphatidylethanolamines; PC, phosphatidylcholines; PC-O, 1-alkyl-2-acylglycerophosphocholines; PE, phosphatidylethanolamines; PE-O, 1-alkyl-2-acylglycerophosphoethanolamines; PG, phosphatidylglycerols; PI, phosphatidylinositols; PS, phosphatidylserines; SM, sphingomyelins; TAG, triacylglycerols.