Dear Editor,The LATERAL ORGAN BOUNDARIES DOMAIN (LBD)/ASYMMETRICLEAVES2-LIKE(ASL)genes(hereafter referred to as LBD) encode proteins containing a conserved plant-specific LOB domain and play roles in lateral organ development (Iwakawa et al.,2002;Shuai et al.,2002;Majer and Hochholdinger,2011).The LOB domain is approximately 100 amino acids in length and contains a conserved four-Cys motif (CX2CX6CX3C),the Gly-Ala-Ser block (GAS),and the leucine-zipper-like coiled-coil motif (LX6LX3LX6L)(Shuai et al.,2002).The leucine-zipper-likecoiled-coil motif in the LOB domain is predicted to function in protein dimerization.LOB,AS2,and LBD4 preferentially bind unique DNA sequences in electrophoretic mobility shift assays (EMSAs) (Husbands et al.,2007).The LOB domain of AS2 cannot be functionally replaced by those of other members of the LOB family,indicating that dissimilar amino acid residues in the LOB domains are important for characteristic functions of the family members (Matsumura et al.,2009).