Validated using a knockout cell lineRabMAb

Anti-Cdk4 antibody [EPR4513-32-7] (ab108357)


  • Product nameAnti-Cdk4 antibody [EPR4513-32-7]
    See all Cdk4 primary antibodies
  • Description
    Rabbit monoclonal [EPR4513-32-7] to Cdk4
  • Tested applicationsWB, IHC-P, Flow Cyt, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide (the amino acid sequence is considered to be commercially sensitive) corresponding to Human Cdk4 (C terminal).

  • Positive control
    • WB: Hela, MCF7, K562, and Ramos cell lysates. IHC-P: Human urothelial carcinoma and cervix carcinoma tissues. ICC/IF: Cdk4 knockout HAP1 cells Flow Cyt: MCF-7 cells.
  • General notes

    This product is a recombinant rabbit monoclonal antibody.

    We are constantly working hard to ensure we provide our customers with best in class antibodies. As a result of this work we are pleased to now offer this antibody in purified format. We are in the process of updating our datasheets. The purified format is designated ‘PUR’ on our product labels. If you have any questions regarding this update, please contact our Scientific Support team.

    Produced using Abcam’s RabMAb® technology. RabMAb® technology is covered by the following U.S. Patents, No. 5,675,063 and/or 7,429,487.

    A trial size is available to purchase for this antibody.

    Mouse, Rat: We have preliminary internal testing data to indicate this antibody may not react with these species. Please contact us for more information.
    This clone has been knockout validated.


    Alternative versions available:

    Anti-Cdk4 antibody (Alexa Fluor® 488) [EPR4513] (ab193966)

    Anti-Cdk4 antibody (Alexa Fluor® 647) [EPR4513] - Loading Control (ab193967)
    Anti-Cdk4 antibody (HRP) [EPR4513] - Loading Control (ab193968)



Our Abpromise guarantee covers the use of ab108357 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
WB 1/1000 - 1/10000. Detects a band of approximately 34 kDa (predicted molecular weight: 34 kDa).
IHC-P 1/100 - 1/250. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.

See protocols (link:

Flow Cyt 1/10 - 1/100.

ab172730 - Rabbit monoclonal IgG, is suitable for use as an isotype control with this antibody.

ICC/IF 1/500.


  • FunctionSer/Thr-kinase component of cyclin D-CDK4 (DC) complexes that phosphorylate and inhibit members of the retinoblastoma (RB) protein family including RB1 and regulate the cell-cycle during G(1)/S transition. Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complexes and the subsequent transcription of E2F target genes which are responsible for the progression through the G(1) phase. Hypophosphorylates RB1 in early G(1) phase. Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals. Also phosphorylates SMAD3 in a cell-cycle-dependent manner and represses its transcriptional activity. Component of the ternary complex, cyclin D/CDK4/CDKN1B, required for nuclear translocation and activity of the cyclin D-CDK4 complex.
  • Involvement in diseaseDefects in CDK4 are a cause of susceptibility to cutaneous malignant melanoma type 3 (CMM3) [MIM:609048]. Malignant melanoma is a malignant neoplasm of melanocytes, arising de novo or from a pre-existing benign nevus, which occurs most often in the skin but also may involve other sites.
  • Sequence similaritiesBelongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. CDC2/CDKX subfamily.
    Contains 1 protein kinase domain.
  • Post-translational
    Phosphorylation at Thr-172 is required for enzymatic activity. Phosphorylated, in vitro, at this site by CCNH-CDK7, but, in vivo, appears to be phosphorylated by a proline-directed kinase. In the cyclin D-CDK4-CDKN1B complex, this phosphorylation and consequent CDK4 enzyme activity, is dependent on the tyrosine phosphorylation state of CDKN1B. Thus, in proliferating cells, CDK4 within the complex is phosphorylated on Thr-172 in the T-loop. In resting cells, phosphorylation on Thr-172 is prevented by the non-tyrosine-phosphorylated form of CDKN1B.
  • Cellular localizationCytoplasm. Nucleus. Membrane. Cytoplasmic when non-complexed. Forms a cyclin D-CDK4 complex in the cytoplasm as cells progress through G(1) phase. The complex accumulates on the nuclear membrane and enters the nucleus on transition from G(1) to S phase. Also present in nucleoli and heterochromatin lumps. Colocalizes with RB1 after release into the nucleus.
  • Information by UniProt
  • Database links
  • Alternative names
    • Cdk 4 antibody
    • cdk4 antibody
    • CDK4 protein antibody
    • CDK4_HUMAN antibody
    • Cell division kinase 4 antibody
    • Cell division protein kinase 4 antibody
    • CMM 3 antibody
    • CMM3 antibody
    • Crk3 antibody
    • Cyclin dependent kinase 4 antibody
    • Cyclin-dependent kinase 4 antibody
    • Melanoma cutaneous malignant 3 antibody
    • MGC14458 antibody
    • p34 cdk4 antibody
    • PSK J3 antibody
    • PSK-J3 antibody
    see all

Anti-Cdk4 antibody [EPR4513-32-7] images

  • Predicted band size : 34 kDa

    Lanes 1, 3 and 5: Wild-type HAP1 cell lysate (20 µg)
    Lanes 2, 4 and 6: CDK4 knockout HAP1 cell lysate (20 µg)
    Lanes 1 and 2: Green signal from target - ab108357 observed at 34 kDa
    Lanes 3 and 4: Red signal from loading control - ab8226 observed at 42 kDa
    Lanes 5 and 6: Merged (red and green) signal
    ab108357 was shown to specifically react with CDK4 when CDK4 knockout samples were used. Wild-type and CDK4 knockout samples were subjected to SDS-PAGE. ab108357 and ab8226 (loading control to beta actin) were both diluted at 1/1000 and incubated overnight at 4°C. Blots were developed with goat anti-rabbit IgG (H + L) and goat anti-mouse IgG (H + L) secondary antibodies at 1/10 000 dilution for 1 h at room temperature before imaging.

  • ab108357 staining Cdk4 in wild-type HAP1 cells (top panel) and Cdk4 knockout HAP1 cells (bottom panel). The cells were fixed with 4% formaldehyde (10min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated with ab108357 at 1/500 dilution and ab195889 at 1/250 dilution (shown in pseudo colour red) overnight at +4°C, followed by a further incubation at room temperature for 1h with a goat secondary antibody to Rabbit IgG (Alexa Fluor® 488) (ab150081) at 2 μg/ml (shown in green). Nuclear DNA was labelled in blue with DAPI.

  • All lanes : Anti-Cdk4 antibody [EPR4513-32-7] (ab108357) at 1/1000 dilution (unpurified)

    Lane 1 : Human osteosarcoma whole cell lysate - control, non-targeting siRNA
    Lane 2 : Human osteosarcoma whole cell lysate - siRNA for CDK4

    Lysates/proteins at 20 µg per lane.

    HRP-conjugated goat anti-rabbit IgG polyclonal at 1/2000 dilution
    developed using the ECL technique

    Performed under reducing conditions.

    Predicted band size : 34 kDa
    Observed band size : 34 kDa

    Exposure time : 5 seconds

    This image is courtesy of an Abreview submitted by Sonia Rocha

    See Abreview

  • All lanes : Anti-Cdk4 antibody [EPR4513-32-7] (ab108357) at 1/1000 dilution (unpurified)

    Lane 1 : Hela cell lysate
    Lane 2 : MCF7 cell lysate
    Lane 3 : K562 cell lysate
    Lane 4 : Ramos cell lysate

    Lysates/proteins at 10 µg per lane.

    Predicted band size : 34 kDa
    Observed band size : 34 kDa
  • Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human urothelial carcinoma tissue labelling Cdk4 with unpurified ab108357 at a dilution of 1/100.

  • Equilibrium disassociation constant (KD)
    Learn more about KD

    Click here to learn more about KD

References for Anti-Cdk4 antibody [EPR4513-32-7] (ab108357)

ab108357 has not yet been referenced specifically in any publications.

Product Wall

Application Western blot
Loading amount 20 µg
Gel Running Conditions Reduced Denaturing (10%)
Sample Human Cell lysate - whole cell (osteosarcoma cells)
Specification osteosarcoma cells
Treatment lane 1 control, lane 2 siRNA for CDK4, 48h
Blocking step Milk as blocking agent for 10 minute(s) · Concentration: 10% · Temperature: 21°C

Dr. Sonia Rocha

Verified customer

Submitted Sep 26 2014