Supplemental Data

Files in this Data Supplement:

• Supplemental Figure 1 - Gas chromatography – mass spectrometry of authentic MeGA₂₀ and the product of the methylation reaction catalyzed by GAMT1 and using GA₂₀ as the substrate.
• Supplemental Figure 2 - Analysis of MeGAs in wild-type siliques by GC-selected ion monitoring using ²H₂MeGAs as internal standards.
• Supplemental Figure 3 - Quantification of GAs by selected reaction monitoring using LC-MS/MS.
• Supplemental Table 1 - Parameters for GA measurements by LC-MS/MS analysis.
• Supplemental Methods