Purity: > 90% by SDS - PAGE Format: Liquid. 20mM Tris-HCl buffer (pH8.0) containing 50% glycerol, 0.2M NaCl, 5mM DTT. CCNB2, also known as G2/mitotic-specific cyclin-B2, belongs to the cyclin family.CCNB2 is essential for the control of the cell cycle at the G2/M (mitosis) transition. It interacts with the CDK1 protein kinase to form a serine/threonine kinase holoenzyme complex also known as maturation promoting factor (MPF). Recombinant human CCNB2 protein, fused to His-tag at N-terminus, was expressed in E.coli and purified by using conventional chromatography.