Involved in the regulation of male meiosis progression. Interacts with CDC20-1, CDC20-2, FZR2/CCS52A1 and FZR1/CCS52A2. Expressed in roots, stems and flowers. Weakly expressed at zygotene, highly at pachitene and disappears from late diplotene to anaphase. Pronounced peak at the G1/S boundary but does not show mitotic expression. Belongs to the cyclin family. Cyclin AB subfamily.