Table II. Molecular species composition of leaf PG from wild-type and mutant Arabidopsis.
Analyses were conducted by collision-induced dissociation time-of-flight mass spectrometry as described under “Materials and Methods.” Data are normalized from the means of five replicates with ses < 10% of the means. WT, Wild type.
| Fragment Mass | Molecular Species | Percentage of Total PG |
||
| WT | fab1 | S7 | ||
| 760.5 | 18:3/16:1 | 40.3 | 21.6 | 37.4 |
| 762.5 | 18:3/16:0 + 18:2/16:1 | 30.0 | 18.5 | 29.2 |
| 764.5 | 18:2/16:0 + 18:1/16:1 | 13.5 | 7.3 | 14.8 |
| 766.5 | 18:1:16:0 | 8.1 | 4.3 | 7.8 |
| – | Other unsaturated species | 0.5 | 0.1 | 0.1 |
| 768.6 | 18:0/16:0 | 0.6 | 0.3 | 0.1 |
| 738.5 | 16:0/16:1 | 3.6 | 26.1 | 6.5 |
| 740.5 | 16:0/16:0 | 3.4 | 21.8 | 4.1 |
| Total high-melting-point species | 7.6% | 48.2% | 10.7% | |