Table 2.
MS/MS-based phospholipid identification increased in breast cancer (600–850 m/z)
| m/z | Lipid identification | Ion |
|---|---|---|
| 671.47 | PA (16:0/18:2) | [M-H]- |
| PA (16:1/18:1) | [M-H]- | |
| PE (16:1/16:0) | [M-NH3-H]- | |
| 673.48 | PA (16:0/18:1) | [M-H]- |
| PA (18:0/16:1) | [M-H]- | |
| PE (16:0/16:0) | [M-NH3-H]- | |
| 687.5 | PA (P-20:0/16:0) | [M-H]- |
| PA (O-18:0/18:1) | [M-H]- | |
| 699.5 | PE (16:0/18:1) | [M-NH3-H]- |
| PA (18:1/18:1) | [M-H]- | |
| PA (18:0/18:2) | [M-H]- | |
| 713.51 | PA (P-20:0/18:1) | [M-H]- |
| PA (O-20:0/18:2) | [M-H]- | |
| PG (P-16:0/18:1) | [M-H2O-H]- | |
| 714.51 | PE (16:0/18:2) | [M-H]- |
| PE (16:1/18:1) | [M-H]- | |
| PE (16:2/18:0) | [M-H]- | |
| 716.52 | PE (18:0/16:1) | [M-H]- |
| PE (16:0/18:1) | [M-H]- | |
| 717.51 | PA (O-16:0/20:4) | [M + Cl]- |
| PC (16:0/16:0) | [M-CH3-H]- | |
| 735.47 | PA (P-20:0/20:4) | [M-H]- |
| PA (P-20:1/20:3) | [M-H]- | |
| PG (O-18:0/16:0) | [M-H]- | |
| PA (18:0/18:2) | [M + Cl]- | |
| PA (18:1/18:1) | [M + Cl]- | |
| PA (P-18:0/22:4) | [M-H]- | |
| 742.54 | PE (18:0/18:2) | [M-H]- |
| PE (18:1/18:1) | [M-H]- | |
| PC (16:1/18:1) | [M-CH3-H]- | |
| PC (16:0/18:2) | [M-CH3-H]- | |
| 744.55 | PC (16:0/18:1) | [M-CH3-H]- |
| PC (18:0/16:1) | [M-CH3-H]- | |
| PE (18:0/18:1) | [M-H]- | |
| 747.51 | PA (18:1/22:5) | [M-H]- |
| PA (18:2/22:4) | [M-H]- | |
| PE (18:1/20:4) | [M-NH3-H]- | |
| PE (16:0/22:5) | [M-NH3-H]- | |
| PE (18:0/20:5) | [M-NH3-H]- | |
| 766.54 | PS (P-16:0/20:4) | [M-H]- |
| PE (18:0/20:4) | [M-H]- | |
| PC (16:0/20:4) | [M-CH3-H]- | |
| 768.55 | PC (18:1/18:2) | [M-CH3-H]- |
| PC (16:0/20:3) | [M-CH3-H]- | |
| PE (20:2/18:1) | [M-H]- | |
| PE (18:0/20:3) | [M-H]- | |
| 770.57 | PE (18:0/20:2) | [M-H]- |
| PC (18:1/18:1) | [M-CH3-H]- | |
| PC (18:0/18:2) | [M-CH3-H]- | |
| 772.58 | PE (18:0/20:1) | [M-H]- |
| PC (18:0/18:1) | [M-CH3-H]- | |
| PS (O-18:0/18:2) | [M-H]- | |
| PE (P-18:1/22:6) | [M-H]- | |
| 792.55 | PC (16:0/18:2) | [M + Cl]- |
| PC (18:2/20:3) | [M-CH3-H]- | |
| PC (18:0/20:5) | [M-CH3-H]- | |
| PC (18:1/20:4) | [M-CH3-H]- | |
| PE (18:1/22:4) | [M-H]- | |
| PE (18:0/22:5) | [M-H]- | |
| 794.57 | PC (16:0/22:4) | [M-CH3-H]- |
| PC (18:1/20:3) | [M-CH3-H]- | |
| PC (18:0/20:4) | [M-CH3-H]- | |
| PC (16:0/18:1) | [M + Cl]- |
Possible lipid identifications from tandem mass spectrometry (MS/MS) data for each significant m/z peak in negative mode. Numbers within brackets represent the number of carbons in the fatty acid chain, followed by the number of double bonds (C:N). PA phosphatidic acid, PE phosphatidylethanolamine, PC phosphatidylcholine, PS phosphatidylserine