May play a role in meristem function, and may be involved in maintaining cells in an undifferentiated, meristematic state, and its expression disappears at the same time the shoot apex undergoes the transition from vegetative to reproductive development (PubMed:11934861). Positive regulator of LATERAL ORGAN BOUNDARIES (LOB) (PubMed:11934861). Probably binds to the DNA sequence 5'-TGAC-3' (PubMed:11934861). Able to traffic from the L1 to the L2/L3 layers of the meristem, presumably through plasmodesmata (PubMed:12900451). May form heterodimeric complex with the TALE/BELL proteins BEL1, BLH2, BLH8/PNF and BLH9/PNY (PubMed:11701881, PubMed:12897247, PubMed:16741748, PubMed:17873098). Interacts with OFP1, OFP2, OFP4, OFP6 and OFP12 (PubMed:15781858). Interacts with CCT7 and CCT8 (PubMed:21868675). Interacts with KNATM-B (PubMed:18398054). Binds to AGO10/PNH (PubMed:26390296). Interacts with BZIP30 (PubMed:27402171). Expressed in the vegetative meristem. Present in the base of flower primordia (PubMed:26390296). Negatively regulated by ASYMMETRIC LEAVES1 (AS1) and ASYMMETRIC LEAVES2 (AS2). Belongs to the TALE/KNOX homeobox family.