Table I. Analysis of O-acetylation status of xylan in inflorescence stem by 2D HSQC NMR.

The values are percentages of acetylated hydroxyl groups out of the total detected. The full spectra are shown in Supplemental Figure S9. Boldface values indicate significance compared with the wild type (P < 0.01, n = 3).

O-Acetylation Status	Wild Type	axy9.1	axy9.2	AXY9 Overexpressed in axy9.2
O2-Acetate	23.0 ± 0.8	14.2 ± 0.5	4.4 ± 0.1	19.5 ± 0.4
O3-Acetate	25.7 ± 2.1	18.2 ± 0.7	4.7 ± 0.1	25.1 ± 0.5
O2,3-Acetate	8.1 ± 0.4	4.1 ± 0.7	1.8 ± 0.2	8.1 ± 0.6
Total	56.9 ± 2.4	36.4 ± 1.9	11.0 ± 0.3	53.0 ± 0.8