This domain is required for the nuclear localisation of these proteins [1]. All of these proteins are members of the Tale/Knox homeodomain family, a subfamily within homeobox Pfam:PF00046.

1: Expression of a class 1 knotted1-like homeobox gene is down-regulated in pea compound leaf primordia. Hofer J, Gourlay C, Michael A, Ellis TH; Plant Mol Biol 2001;45:387-398. PMID:11352458