Plays a role in determining the spatial distribution of aliphatic glucosinolates (AGLSs) within the leaf, mostly short chained. Together with MYB28/HAG1 and MYB29/HAG3, promotes aliphatic glucosinolate biosynthesis and represses indolic glucosinolate biosynthesis, but could not activate AGSL biosynthesis on its own. Can form complexes with MYC2, MYC3 or MYC4. Expressed in both vegetative and generative organs. Mostly present in inflorescences, flowers and seedlings, in the transition zone between roots and the foliar part, and stems, and, to a lower extent, in leaves (in midvein and trichomes). Primarily present around the midvein in seedlings. Accumulates gradually in expanding leaves, reaching a maximum in fully expanded leaves in both primary and secondary veins. Slightly induced by auxin (IAA) and jasmonic acid (JA). Accumulates upon mechanical stimuli (e.g. wounding) in inflorescence. Down-regulated by sulfur-deficient stress. Extended C-terminus.