TABLE 1.
Assignments of m/z values detected in MALDI-TOF mass spectra of lipids from semen.
| m/z Value | Assignment [M–H]– | Assignment [M+H]+ |
| 465.3 | Chol-S | |
| 496.6 | LPC (16:0) | |
| 687.7 | SM (16:0) | |
| 701.6 | SM (16:0) | |
| 703.7 | SM (16:0) | |
| 716.6 | PE (34:1) | |
| 725.6 | SM (16:0) + Na+ | |
| 726.7 | PE (P−36:2) | |
| 728.7 | PE (P−36:1) | |
| 732.7 | PC (32:1) | |
| 734.6 | PC (32:0) | |
| 742.7 | PE (36:2) | |
| 744.6 | PE (36:1) | |
| 746.7 | PS (P−34:0) | |
| 748.7 | PS (O−34:0) | |
| 750.7 | PE (O−38:5) | |
| 758.7 | PC (34:2) | |
| 760.7 | PC (34:1) | |
| 767.6 | SGG (O−30:0) | |
| 782.8 | PC (36:4)/PC (34:1) + Na+ | |
| 784.8 | PC (36:3) | |
| 786.8 | PC (36:2) | |
| 788.7 | PS (36:1) | PC (36:1) |
| 792.7 | PC (O−38:6) | |
| 795.7 | SGG (O−32:0) | |
| 806.7 | PC (38:6) | |
| 809.7 | SGG (O−33:0)/PI (32:0) | |
| 821.7 | SGG (O−34:1)/SGG (P−34:0) PI (O−34:1)/PI (P−34:0) | |
| 823.7 | SGG (O−34:0)/PI (O−34:0) | |
| 834.9 | PC (40:6) | |
| 835.8 | PI (34:1) | |
| 861.8 | PI (36:2) | |
| 863.8 | PI (36:1) | |
| 883.8 | PI (38:5) | |
| 885.8 | PI (38:4) | |
| 887.8 | PI (38:3) | |
| 909.8 | PI (40:6) | |
| 1283.7 | NG | |
| 1352.3 | CL (64:0) | |
| 1409.7 | NG | |
| 1466.1 | NG | |
| 1494.5 | NG | |
| 1577.1 | NG | |
| 1603.2 | NG |
The numbers (x:y) denote the total length (as carbon numbers) and number of double bonds of acyl chains respectively. O-x:y = alkyl-acyl chains; P-x:y = alkenyl-acyl chains; NG = neutral glycosphingolipid.