A phylogenetic analysis with the R2R3 motif of MYB28 showed that it and two homologues; MYB29 and MYB76 were members of an clade that included three characterized regulators of indole GSLs. Over-expression of the individual MYB genes showed that they all had the capacity to increase the production of aliphatic GSLs in leaves and seeds and induce gene expression of aliphatic biosynthetic genes within leaves. Analysis of leaves and seeds knockout mutants showed that mutants of MYB29 and MYB76 have reductions in only short-chained aliphatic GSLs whereas a mutant in MYB28 has reductions in both short- and long-chained aliphatic GSLs (Sonderby et al. 2007)