Cyclins are a family of proteins that activate specific cyclin- dependent kinases required for progression through the cell cycle.
The entry of all eukaryotic cells into mitosis is regulated by activation of cdc2/cdk1 at the G2/M transition.
This activation is a multi-step process that begins with the binding of the regulatory subunit, cyclin B1, to cdc2/cdk1 to form the mitosis-promoting factor (MPF).
MPF remains in the inactive state until phosphorylation of cdc2/cdk1 at Thr161 by cdk activating kinase (CAK) (1,2) and dephosphorylation of cdc2/cdk1 at Thr14/Tyr15 by cdc25C (3-5).
Four cyclin B1 phosphorylation sites (Ser126, 128, 133, and 147) are located in the cytoplasmic retention signal (CRS) domain and are thought to regulate the translocation of cyclin B1 to the nucleus at the G2/M checkpoint, promoting nuclear accumulation and initiation of mitosis (6-9).
While MPF itself can phosphorylate Ser126 and Ser128, polo-like kinase 1 (PLK1) phosphorylates cyclin B1 preferentially at Ser133 and possibly at Ser147 (6,10).
At the end of mitosis, cyclin B1 is targeted for degradation by the anaphase-promoting complex (APC), allowing for cell cycle progression (11).
Research studies have shown that cyclin B1 is overexpressed in breast, prostate, and non-small cell lung cancers (12-14).
Applications:Suitable for use in Western Blot, Immunohistochemistry, Immunofluorescence/Immunocytochemistry and ELISA.
Other applications not tested.
Recommended Dilution:Western Blot: 1:500-1:2000, incubate membrane with diluted primary antibody in TBS, 5% milk, 0.1% Tween 20 at 4°C with gentle shaking, overnight
Immunohistochemistry: 1:50-1:200Immunofluorescence (IF-IC): 1:100-1:500ELISA (peptide): 1:20,000-1:40,000Optimal dilutions to be determined by the researcher.
Storage and Stability:May be stored at 4°C for short-term only.
Aliquot to avoid repeated freezing and thawing.
Store at -20°C.
Aliquots are stable for 12 months after receipt.
For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
仕様
Size：200ul
Host：rabbit
Grade：Affinity Purified
Purity：Purified by immunoaffinity chromatography from serum.
Form：Supplied as a liquid in PBS, pH 7.4, 0.02% sodium azide, 50% glycerol.
Specificity：Recognizes endogenous levels of total CCNB1. Species Crossreactivity: Human, Mouse and Rat
Isotype：IgG
Calc Applications Abbrev：E IC IF IHC WB
Calc Crossreactivity：Hu Mo Rt
Immunogen：Synthetic peptide corresponding to human CCNB1.
