Regulatory subunit of the condensin complex, a complex required for conversion of interphase chromatin into mitotic-like condense chromosomes. The condensin complex probably introduces positive supercoils into relaxed DNA in the presence of type I topoisomerases and converts nicked DNA into positive knotted forms in the presence of type II topoisomerases (By similarity). Essential protein. Component of the condensin complex. Localized at mitotic chromosomes from pro-metaphase to telophase. During interphase, mainly found in cytoplasm. Mostly expressed in flower buds and flowers, and, to a lower extent, in roots, stems, leaves and seedlings. Embryo development arrested at the preglobular stage. Belongs to the CND2 (condensin subunit 2) family.