Analysis Note

ControlPositive Control: HeLa cells, 3T3 cells , F9 cells, mouse embryos

Application

Immunocytochemistry: 1:500-1:5,000

Immunohistochemistry: 1:500-1:5,000

ELISA: 1:500-1:5,000

Western blot: not recommended. For Western blot use MAB3446.

Optimal working dilutions must be determined by the end user.

Use Anti-Heterochromatin Protein-1 α Antibody, clone 2HP-1H5 (mouse monoclonal antibody) validated in ELISA, ICC, IHC to detect Heterochromatin Protein-1 α also known as HP1a, Antigen p25, Chromobox Protein Homolog 5.

General description

Chromatin assembly factor-1 (CAF-1) is a multisubunit protein complex that comprises three polypeptide subunits known as p150, p60, and p48. CAF-1 is a nucleosome assembly factor that deposits newly synthesized and acetylated histones H3/H4 into nascent chromatin during DNA replication.

Heterochromatin is characterized as densely coiled chromatin that generally replicates late during S phase, has a low gene density, and contains large blocks of repetitive DNA that is relatively inaccessible to DNA-modifying reagents. In late S phase, p150 directly associates with heterochromatin associated proteins 1 (HP1α, HP1β and HP1γ). As cells prepare for mitosis, CAF-1 p150 and some HP1 progressively dissociate from heterochromatin, coinciding with the phosphorylation of histone H3. The HP1 proteins reassociate with chromatin at the end of mitosis, as histone H3 is dephosphorylated.

Immunogen

Recombinant mouse HP1a.

Legal Information

CHEMICON is a registered trademark of Merck KGaA, Darmstadt, Germany

Other Notes

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

Physical form

Liquid ascites no preservative.

Specificity

Reacts with Heterochromatin protein-1 alpha (HP1alpha) between amino acids 67 and 119.