In a screen for the trans-activation potential of various transcription factors toward GSL biosynthetic genes; MYB28 was identified as a positive regulator of aliphatic methionine-derived GSLs. The content of aliphatic GSLs as well as transcript levels of aliphatic GSL biosynthetic genes were elevated in gain-of-function mutants and decreased in MYB28 RNAi knock-down mutants (Gigolashvili et al. 2007)