Regulatory subunit of the condensin-2 complex, a complex that seems to provide chromosomes with an additional level of organization and rigidity and in establishing mitotic chromosome architecture (By similarity). The condensin-2 complex plays a role in DNA damage repair or in protecting the genome from certain genotoxic stressors (e.g. boron excess, zeocin and aphidicolin). Component of the condensin-2 complex. Localized at mitotic chromosomes from pro-metaphase to telophase. During interphase, mainly found in nucleolus. Expressed in seedlings, roots, stems, leaves, flower buds and flowers. By boron excess (B). Enhanced sensitivity to excess boron (B), to zeocin, which induces DNA double-strand breaks (DSBs), and to aphidicolin, which blocks DNA replication, probably due to the accumulation of DSBs. Reduced root length, especially in the presence of genotoxic stressors, with twisted shape, ectopic lateral root formation and dense root hairs, as well as short meristematic zones. Belongs to the CND2 H2 (condensin-2 subunit 2) family.