Figure 1.

Domain structures of the 5 HD-ZIP III transcription factors (TFs) and the complementary sequence of miR165b. The four known functional domains (from N-terminus to C-terminus) of the HD-ZIP III TFs are: the homeodomain that is responsible for DNA binding (orange); the basic Leucine Zipper domain (b-ZIP), which is responsible for DNA binding and dimerization (yellow); the START domain, a putative lipid or steroid binding domain (blue diagonal lined). The miR165B binding site is located in the coding sequence of START domain (purple bar); the C-terminal MEKHLA domain (red). The paring of complementary sequence of AtHB15 and miR165b is shown at the bottom of the diagram.