• Product name
  • Description
    Rabbit polyclonal to Cdk9
  • Specificity
    No reaction is observed against other related cyclin dependent kinases.
  • Tested applications
    Suitable for: ICC/IF, ELISA, IHC-P, IP, WBmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Multiple synthetic peptides corresponding to C-terminal and N-terminal domains of the protein coded by the human gene cdk9 (PITALRE)

  • General notes
    cdk9(PITALRE) interacts with a conserved domain in the TRAF-C region of the tumor necrosis factor signal transducer TRAF2. The positive transcription elongation factor b (P-TEFb) is identified as cdk9 paired with cyclin T1.



Our Abpromise guarantee covers the use of ab6544 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF Use at an assay dependent concentration. PubMed: 21378166
ELISA 1/500 - 1/2000.
IHC-P 1/200 - 1/1000.
IP Use at an assay dependent concentration.
WB 1/500 - 1/1000. Predicted molecular weight: 43 kDa.


  • Function
    Member of the cyclin-dependent kinase pair (CDK9/cyclin-T) complex, also called positive transcription elongation factor b (P-TEFb), which facilitates the transition from abortive to production elongation by phosphorylating the CTD (C-terminal domain) of the large subunit of RNA polymerase II (RNAP II), SUPT5H and RDBP. The CDK9/cyclin-K complex has also a kinase activity toward CTD of RNAP II and can substitute for P-TEFb in vitro.
  • Tissue specificity
  • Sequence similarities
    Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. CDC2/CDKX subfamily.
    Contains 1 protein kinase domain.
  • Cellular localization
  • Information by UniProt
  • Database links
  • Alternative names
    • C-2K antibody
    • CDC2 related kinase antibody
    • CDC2L4 antibody
    • Cdk 9 antibody
    • Cdk9 antibody
    • CDK9_HUMAN antibody
    • Cell division cycle 2-like protein kinase 4 antibody
    • Cell division protein kinase 9 antibody
    • CTK1 antibody
    • Cyclin dependent kinase 9 antibody
    • Cyclin-dependent kinase 9 antibody
    • PITALRE antibody
    • Serine/threonine-protein kinase PITALRE antibody
    • TAK antibody
    • Tat associated kinase complex catalytic subunit antibody
    see all

Anti-Cdk9 antibody images

  • Immunohistochemical staining of mouse tissue using anti-cdk9 (PITALRE) antiserum. The staining shows the location of cdk9 / PITALRE protein in developing mouse tissue. Arrow indicates area of high expression.

  • Immunofluorescence analysis of HeLa cells, staining Cdk9 (red) with ab6544.

    The cells were fixed with 4% paraformaldehyde and permeabilized with 0.5% Triton X-100 for 10 min at 4°C. The cells were incubated with 0.05% PBS-T before incubating with primary antibody at 1/2000 dilution.

References for Anti-Cdk9 antibody (ab6544)

This product has been referenced in:
  • Kuzmina A  et al. A single point mutation in cyclin T1 eliminates binding to Hexim1, Cdk9 and RNA but not to AFF4 and enforces repression of HIV transcription. Retrovirology 11:51 (2014). WB . Read more (PubMed: 24985467) »
  • Zhang H  et al. SIRT2 directs the replication stress response through CDK9 deacetylation. Proc Natl Acad Sci U S A 110:13546-51 (2013). Read more (PubMed: 23898190) »

See all 5 Publications for this product

Product Wall

Abcam guarantees this product to work in the species/application used in this Abreview.
Western blot
Human Cell lysate - whole cell (HeLa Cells)
Loading amount
35 µg
HeLa Cells
Gel Running Conditions
Reduced Denaturing (8 % SDS gel)
Blocking step
Milk as blocking agent for 45 minute(s) · Concentration: 5% · Temperature: 25°C

Abcam user community

Verified customer

Submitted Feb 04 2013

Abcam has not validated the combination of species/application used in this Abreview.
Western blot
Xenopus laevis Cell lysate - whole cell (Xenopus laevis gastrula embryo extract (Stage12))
Loading amount
0.5 µg
Xenopus laevis gastrula embryo extract (Stage12)
Gel Running Conditions
Reduced Denaturing (10% SDS-PAGE)
Blocking step
BSA as blocking agent for 1 hour(s) and 0 minute(s) · Concentration: 1% · Temperature: 23°C

Dr. Kei Miyamoto

Verified customer

Submitted Oct 10 2012

Thank you very much for your interest in our products.

We have three antibodies which may interest you as they are all tested for both IP and WB.In addition,the homology between the two species is 100% for this protein, therefore,it seems ver...

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