Description
This antibody recognizes a protein of 50-55 kDa, which is identified as Cyclin A. Its epitope is located amino acids 144-148 of the human protein. Cyclins are regulatory subunits of the cyclin-dependent kinases (cdk�s) and they control transition at different specific phases of the cell cycle. The temporal expression of cyclins is tightly regulated and subsequently plays a critical role in controlling the enzymatic activity of cdk�s. These cyclin/cdk complexes are essential for passage through specific stages in the cell cycle. In mammalian somatic cells, Cyclin A is required for S-phase and passage through G2-phase. The D and E type cyclins regulate the passage of G1, while Cyclin B is a critical regulator of mitosis. Mutation or disruption of normal Cyclin A expression causes cells to arrest in G2-phase