Date published: 2025-11-21

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Rab 21 Antibody (B16K): sc-81917

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Datasheets
  • Rab 21 Antibody (B16K) is a mouse monoclonal IgG1 κ Rab 21 antibody, cited in 12 publications, provided at 100 µg/ml
  • raised against recombinant Rab 21 of human origin
  • recommended for detection of Rab 21 of mouse, rat and human origin by WB, IP, IF, IHC(P) and ELISA
  • m-IgG Fc BP-HRP and m-IgG1 BP-HRP are the preferred secondary detection reagents for Rab 21 Antibody (B16K) for WB and IHC(P) applications. These reagents are now offered in bundles with Rab 21 Antibody (B16K) (see ordering information below).

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Rab 21 Antibody (B16K) is a mouse monoclonal IgG1 kappa light chain antibody that detects Rab 21 protein of mouse, rat, and human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA). Anti-Rab 21 antibody (B16K) is available as a non-conjugated format. Rab 21 protein plays a crucial role in endosomal trafficking, particularly in integrin transport, which is vital for cell adhesion and motility. Located primarily at the Golgi membrane, Rab 21 (B16K) antibody recognizes proteins involved in carrier vesicle movement, transporting newly synthesized proteins from endoplasmic reticulum to Golgi complex and secretory vesicles. This process maintains cellular functions and facilitates cell-to-cell communication. Rab 21′s interaction with integrin α chain cytoplasmic domains promotes integrin-mediated cell migration and adhesion, critical in various physiological and pathological contexts, including cancer progression. Rab 21 overexpression enhances integrin endosomal trafficking, facilitating increased cell migration and adhesion in cancer cells, making Rab 21 a significant target for cancer biology research and therapeutic interventions.

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

Rab 21 Antibody (B16K) References:

  1. Expression of Rab small GTPases in epithelial Caco-2 cells: Rab21 is an apically located GTP-binding protein in polarised intestinal epithelial cells.  |  Opdam, FJ., et al. 2000. Eur J Cell Biol. 79: 308-16. PMID: 10887961
  2. A role for the small GTPase Rab21 in the early endocytic pathway.  |  Simpson, JC., et al. 2004. J Cell Sci. 117: 6297-311. PMID: 15561770
  3. A Rab21/LIM-only/CH-LIM complex regulates phagocytosis via both activating and inhibitory mechanisms.  |  Khurana, T., et al. 2005. EMBO J. 24: 2254-64. PMID: 15962002
  4. Varp is a Rab21 guanine nucleotide exchange factor and regulates endosome dynamics.  |  Zhang, X., et al. 2006. J Cell Sci. 119: 1053-62. PMID: 16525121
  5. Small GTPase Rab21 regulates cell adhesion and controls endosomal traffic of beta1-integrins.  |  Pellinen, T., et al. 2006. J Cell Biol. 173: 767-80. PMID: 16754960
  6. Structural basis for Rab GTPase activation by VPS9 domain exchange factors.  |  Delprato, A. and Lambright, DG. 2007. Nat Struct Mol Biol. 14: 406-12. PMID: 17450153
  7. Structure of the APPL1 BAR-PH domain and characterization of its interaction with Rab5.  |  Zhu, G., et al. 2007. EMBO J. 26: 3484-93. PMID: 17581628
  8. Characterization of Rab21-positive tubular endosomes induced by PI3K inhibitors.  |  Egami, Y. and Araki, N. 2008. Exp Cell Res. 314: 729-37. PMID: 18162182
  9. [Multiadaptor 4.1 and RanBP9 protein family members as putative interaction partners for VARP, a Rab21 GTPase guanine nucleotide exchange factor].  |  Pal'gova, IV., et al. 2007. Mol Biol (Mosk). 41: 1009-13. PMID: 18318119

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Rab 21 Antibody (B16K)

sc-81917
100 µg/ml
$333.00

Rab 21 Antibody (B16K): m-IgG Fc BP-HRP Bundle

sc-539669
100 µg Ab; 10 µg BP
$354.00

Rab 21 Antibody (B16K): m-IgG1 BP-HRP Bundle

sc-541648
100 µg Ab; 20 µg BP
$354.00

Can sc-81917: Rab 21 (B16K) monoclonal antibody be used to stain formalin-fixed, paraffin-embedded (FFPE) tissue sections?

Asked by: jenniferc
Thank you for your question. Yes, sc-81917: Rab 21 (B16K) is recommended for use in IHC with paraffin-embedded sections. We recommend performing antigen retrieval with sodium citrate buffer (pH 6) and heat. The full protocol can be found here: https://www.scbt.com/scbt/resources/protocols/immunoperoxidase-staining
Answered by: Technical Support
Date published: 2017-03-24
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Rated 5 out of 5 by from Great for IF studiesThe Rab 21 Antibody (B16K): sc-81917 provides great data for immunofluorescence applications showing staining pattern with nuclear and cytoplasmic localization.
Date published: 2017-02-07
Rated 5 out of 5 by from IF: Very good nuclear and cytoplasmic stainingIF: Very good nuclear and cytoplasmic staining in paraformaldehyde-fixed HeLa cells. -SCBT QC
Date published: 2015-03-15
Rated 5 out of 5 by from Robust staining in paraffinRobust staining in paraffin-embedded human tonsil tissue. -SCBT QC
Date published: 2015-02-27
Rated 5 out of 5 by from Worked well for Western with HeLa whole cellWorked well for Western with HeLa whole cell lysate. -SCBT QC
Date published: 2013-08-26
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Rab 21 Antibody (B16K) is rated 5.0 out of 5 by 4.
  • y_2025, m_11, d_13, h_10
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