Microtubule-associated protein that may be involved in the maturation of cell plates and proper insertion of cross-walls after cytokinesis. Interacts with KCBP. During interphase, binds cortical microtubules. In M-phase, locates to the preprophase band. During cytokinesis, binds the phragmoplast but not the forming cell plate at the midline, and at a later stage the cortical division site. After cell-plate insertion, enters the new cross-wall. Strongly expressed in dividing cells, like the meristemic region of the root tip. Expressed during auxin-induced lateral root formation. Induced between 4 and 8 hours after treatment with auxin and remains high for at least 24 hours. No visible phenotype.