Fig. 1: Structures of IAA metabolites and IAA inactivation pathways.
From: The main oxidative inactivation pathway of the plant hormone auxin

a Structures of IAA metabolites. b The previous model of IAA catabolic pathways. GH3 and DAO irreversibly inactivate IAA through different pathways. c The new model proposed here: the reversible IAA inactivation pathway composed of GH3, ILR1, and DAO1 in Arabidopsis plants.