Hamburger Menu Button
Thermo Fisher Scientific Logo
Sign in
Don't have an account ? Create Account
  • Products
    • Antibodies
    • Cell Culture Media
    • Chemicals
    • Chromatography Columns and Cartridges
    • Lab Equipment
    • Lab Plasticware and Supplies
    • Microplates
    • Oligos, Primers, Probes and Genes
    • TaqMan Real-Time PCR Assays
    • Greener Products
    • See all product categories
  • Applications
    • Bioprocessing
    • Cell Culture and Transfection
    • Cell and Gene Therapy
    • Chromatography
    • Molecular Testing
    • Digital Solutions
    • DNA and RNA Extraction and Analysis
    • Spectroscopy, Elemental and Isotope Analysis
    • See all applications and techniques
  • Services
    • 360° CDMO and CRO Solutions
    • CDMO Services
    • CRO Services
    • Custom Services
    • Enterprise Services
    • Financial and Leasing Services
    • Instrument Services
    • Lab Informatics
    • OEM and Commercial Supply
    • Training Services
    • Unity Lab Services
    • See all services
  • Help and Support
    • How to Order
    • Instrument Support
    • Learning Centers
    • Register for an Account
    • Technical Support Centers
    • See all help and support topics
  • Popular
    • TaqMan Real-Time PCR Assays
      TaqMan Real-Time PCR Assays
    • Antibodies
      Antibodies
    • Oligos, Primers & Probes
      Oligos, Primers & Probes
    • GeneArt Gene Synthesis
      GeneArt Gene Synthesis
    • Cell Culture Plastics
      Cell Culture Plastics
  • Contact Us
  • Quick Order
  • Order Status and Tracking
  • Documents and Certificates
Thermo Fisher Scientific Logo

Search Thermo Fisher Scientific

Search All
Search button Close
          • Order Status
          • Quick Order
          • Sign in
            Sign in
            Don't have an account ? Create Account
            • Account
            • Check Order Status
            • Aspire Member Program
            • Connect: Lab, Data, Apps
            • Custom Products & Projects
            • Services Central

          Disclaimer

          Clicking the images or links will redirect you to a website hosted by BenchSci that provides third-party scientific content. Neither the content nor the BenchSci technology and processes for selection have been evaluated by us; we are providing them as-is and without warranty of any kind, including for use or application of the Thermo Fisher Scientific products presented.

          • Primary Antibodies ›
          • p21 Antibodies

          Invitrogen

          p21 Monoclonal Antibody (R.229.6)

          Advanced Verification
          31 Published Figures
          34 References
          View all (83) p21 antibodies

          Promotion

          View available promotion(s)

          Promo code: {{promo.promoCode}} {{promo.promoDescription}}. {{$productOrderCtrl.translations['antibody.pdp.commerceCard.promotion.learnmore']}}

          Datasheet
          Protocols
          Questions & Answers
          Datasheet
          Protocols
          Questions & Answers

          Cite p21 Monoclonal Antibody (R.229.6)

          • Antibody Testing Data (6)
          • Published Figures (31)
          • Advanced Verification (3)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          Group 53 Created with Sketch.
          p21 Antibody in Immunocytochemistry (ICC/IF)
          Group 53 Created with Sketch.

          FIGURE: 1 / 40

          {{ $ctrl.currentElement.advancedVerification.fullName }}
          {{ $ctrl.currentElement.advancedVerification.text }}

          p21 Antibody (MA5-14949) in ICC/IF

          Immunofluorescent analysis of p21 Waf1/Cip1 (green) in HeLa cells either left untreated (left panel) or treated with 5uM Camptothecin for 3 hours (right panel). Formalin fixed cells were permeabilized with 0.1% Triton X-100 in TBS for 10 minutes at room temperature and blocked with 1% Blocker BSA (Product # 37525) for 15 minutes at room temperature. Cells were probed with a p21 Waf1/Cip1 monoclonal antibody (Product # MA5-14949) at a dilution of 1:100 for at least 1 hour at room temperature, washed with PBS, and incubated with DyLight 488 ... View More {{ $ctrl.currentElement.advancedVerification.fullName }} validation info. View more
          Published figure supplied by benchsci-logo
          PMID: {{$ctrl.currentElement.benchSciPubmedId}}
          View Product

          {{$ctrl.videoDesc}}

          {{$ctrl.videoLongDesc}}

          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Flow Cytometry (Flow)
          p21 Antibody in Immunoprecipitation (IP)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunohistochemistry (Paraffin) (IHC (P))
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry, Immunohistochemistry (ICC/IF, IHC)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Immunocytochemistry (ICC/IF)
          p21 Antibody in Western Blot, Immunohistochemistry, Flow Cytometry (WB, IHC, Flow)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody in Western Blot (WB)
          p21 Antibody
          p21 Antibody
          p21 Antibody

          Product Details

          MA5-14949

          Applications
          Tested Dilution
          Publications

          Western Blot (WB)

          1:1,000
          View 12 publications 12 publications

          Immunohistochemistry (IHC)

          -
          View 6 publications 6 publications

          Immunohistochemistry (Paraffin) (IHC (P))

          1:50
          View 1 publication 1 publication

          Immunocytochemistry (ICC/IF)

          1:800
          View 13 publications 13 publications

          Flow Cytometry (Flow)

          1:100-1:400
          View 2 publications 2 publications

          Immunoprecipitation (IP)

          1:50
          -
          Product Specifications

          Species Reactivity

          Human, Non-human primate

          Published species

          Human, Mouse

          Host/Isotype

          Rabbit / IgG

          Class

          Monoclonal

          Type

          Antibody

          Clone

          R.229.6

          Immunogen

          Synthetic peptide corresponding to residues near the carboxy-terminus of human p21
          View immunogen

          Conjugate

          Unconjugated Unconjugated Unconjugated

          Form

          Liquid

          Concentration

          244 µg/mL

          Purification

          Affinity chromatography

          Storage buffer

          0.01M HEPES, pH 7.5, with 0.15M NaCl, 100µg/mL BSA, 50% glycerol

          Contains

          <0.02% sodium azide

          Storage conditions

          -20°C

          Shipping conditions

          Ambient (domestic); Wet ice (international)

          RRID

          AB_10984461

          Product Specific Information

          Antibodies to this protein (and modification) were previously sold as part of a Thermo Scientific Cellomics High Content Screening Kit. This replacement antibody is now recommended for researchers who need an antibody for high content cell based assays. It has been thoroughly tested and validated for cellular immunofluorescence (IF) applications. Further optimization including the selection of the most appropriate fluorescent Dylight conjugated secondary antibody may have to be performed for your high content assay.

          It is not recommended to aliquot this antibody.

          This antibody is not cross-reactive with other CDK inhibitors.

          Target Information

          Protein p21 is a tumor suppressor protein which is an inhibitor of Cyclin-dependent kinases (CDK) and is transcriptionally activated by p53. P21 is important in the response of cells to genotoxic stress and a major transcriptional target of p53 protein. The occurrence of p21 in the nucleus executes binding and inhibition activity of cyclin dependent kinases Cdk1 and Cdk2, and blocks the transition from G1 phase into S phase or from G2 phase into mitosis after DNA damage, which enables the repair of damaged DNA. In the cytoplasm, p21 protein has an anti-apoptotic effect. P21 is able to bind to and inhibit caspase 3, as well as the apoptotic kinases ASK1 and JNK. P21 exhibits a dual function in carcinogenesis, and acts as a tumor suppressor, prevents apoptosis, and acts as an oncogene.

          For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.

          Bioinformatics

          Protein Aliases: Activating Fragment 1; CDK-interacting protein 1; CDK-interaction protein 1; CDNK1A; Cip1); Cyclin-dependent kinase inhibitor 1; Cyclin-dependent kinase inhibitor 1A (p21; cyclin-dependent kinase inhibitor 1A (p21, Cip1); DNA synthesis inhibitor; MDA-6; melanoma differentiation associated protein 6; Melanoma differentiation-associated protein 6; OTTHUMP00000016298; p21; p21Cip1/Waf1; SLC12A9; Wild type p53 activated fragment 1 (WAF1); wild-type p53-activated fragment 1

          View more View less

          Gene Aliases: CAP20; CDKN1; CDKN1A; CIP1; MDA-6; MDA6; P21; p21CIP1; PIC1; SDI1; WAF1

          View more View less

          UniProt ID: (Human) P38936

          View more View less

          Entrez Gene ID: (Human) 1026

          View more View less

          Function(s)
          cyclin-dependent protein serine/threonine kinase inhibitor activity protein binding cyclin-dependent protein kinase activating kinase activity cyclin binding ubiquitin protein ligase binding protein complex binding metal ion binding
          Process(es)
          regulation of cyclin-dependent protein serine/threonine kinase activity G1/S transition of mitotic cell cycle G2/M transition of mitotic cell cycle cellular response to DNA damage stimulus DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest cell cycle arrest Ras protein signal transduction negative regulation of cell proliferation response to toxic substance response to X-ray response to organonitrogen compound negative regulation of gene expression negative regulation of cell growth positive regulation of B cell proliferation organ regeneration cellular response to extracellular stimulus regulation of protein import into nucleus, translocation cellular response to amino acid starvation cellular response to heat negative regulation of phosphorylation response to drug intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator negative regulation of apoptotic process positive regulation of programmed cell death negative regulation of cyclin-dependent protein serine/threonine kinase activity response to arsenic-containing substance positive regulation of fibroblast proliferation protein stabilization response to corticosterone response to hyperoxia intestinal epithelial cell maturation cellular response to ionizing radiation cellular response to UV-B mitotic cell cycle arrest cellular senescence replicative senescence stress-induced premature senescence intrinsic apoptotic signaling pathway positive regulation of cyclin-dependent protein kinase activity negative regulation of G1/S transition of mitotic cell cycle regulation of DNA biosynthetic process positive regulation of reactive oxygen species metabolic process
          It has to be done as per old AB suggested Products section.
          guarantee_icon

          Performance Guarantee

          If an Invitrogen™ antibody doesn't perform as described on our website or datasheet,we'll replace the product at no cost to you, or provide you with a credit for a future purchase.*

          Learn more
          help_icon

          We're here to help

          Get expert recommendations for common problems or connect directly with an on staff expert for technical assistance related to applications, equipment and general product use.

          Contact tech support
          Ordering Plus Icon Minus Icon
          • Order Status
          • Order Help
          • Quick Order
          • Supply Center
          • eProcurement
          Support Plus Icon Minus Icon
          • Help and Support
          • Contact Us
          • Technical Support Centers
          • Documents and Certificates
          • Report a Site Issue
          Resources Plus Icon Minus Icon
          • Learning Centers
          • Promotions
          • Events and Webinars
          • Social Media
          About Thermo Fisher Plus Icon Minus Icon
          • About Us
          • Careers
          • Investors
          • News
          • Social Responsibility
          • Trademarks
          • Consumer Health Data Privacy Policy
          Our Portfolio Plus Icon Minus Icon
          • Thermo Scientific
          • Applied Biosystems
          • Invitrogen
          • Gibco
          • Ion Torrent
          • Fisher Scientific
          • Unity Lab Services
          • Patheon
          • PPD
          • Terms & Conditions
          • Privacy Information Center
          • Price & Freight Policy
          © 2006-2025 Thermo Fisher Scientific Inc. All rights reserved. All trademarks are the property of Thermo Fisher Scientific and its subsidiaries unless otherwise specified.
          United States flag icon
          United States

          Your items have has been added!


          Host server : magellan-search-67c77f6dc7-n6nf2:80/100.66.135.186:80.
          git-commit: 545e792480003146e539d624bd2a21b51d198228
          git-url: https://github.com/thermofisher/magellan-search
          git-branch: release/2.31.0-2025.06.23-1.0