Human TRIM21 Antibody

    
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  • Species Reactivity
    Human
  • Specificity
    Detects human TRIM21 in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human (rh) TRIM, rhTRIM5, rhTRIM5a, rhTRIM32, rhTRIF (aa 29-204), or rhTRIF (aa 474-618) is observed
  • Source
    Monoclonal Mouse IgG1 Clone # 672722
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    E. coli-derived recombinant human TRIM21
    Arg195-Pro293
    Accession # P19474
  • Formulation
    Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
  • Label
    Unconjugated
Product Datasheets

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Applications
  •  
    Recommended
    Concentration
    Sample
  • Immunocytochemistry
    8-25 µg/mL
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Example
Immunocytochemistry
TRIM21 in Human PBMCs. TRIM21 was detected in immersion fixed human peripheral blood mononuclear cells (PBMCs) stimulated for 8 hours with 20 ng/mL of Recombinant Human IFN-gamma (Catalog # 285-IF) using Mouse Anti-Human TRIM21 Monoclonal Antibody (Catalog # MAB6219) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 493-conjugated Anti-Mouse IgG Secondary Antibody (green; Catalog # NL009) and counterstained with DAPI (blue). Specific staining was localized to cell surfaces and cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Preparation and Storage
  • Reconstitution
    Sterile PBS to a final concentration of 0.5 mg/mL.
    Reconstitution Buffer Available
  • Shipping
    The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -20 to -70 °C as supplied.
    • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
    • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: TRIM21
TRIM21 (Tripartite motif-containing protein 21; also Ro(SS-A), 52 kDa Ro Protein/Ro52, and RING finger protein 81) is a 52-56 kDa member of the RING finger-B-box-coiled-coil family of proteins. It is an E3 ligase that is found in both nucleus and cytoplasm, where it is often associated with microtubules. TRIM21 ubiquitinates select proteins. In B cells, it targets the Fc fragment of misfolded IgG, providing QC on its production. In macrophages, it acts in a nondegradative manner on IRF8, promoting innate immunity. Human TRIM21 is 475 amino acids (aa) in length. It contains one E3 ligase RING finger domain (aa 16-55), a B-Box type zinc-finger region (aa 92-123), a coiled-coil region (aa 128-238) and a C-terminal SPRY/B30.2 Ig binding domain (aa 268-465). TRIM21 is reported to form trimers. Over aa 195‑293, human TRIM21 exhibits 72% aa identity with mouse TRIM21.
  • Long Name:
    Tripartite Motif-containing Protein 21
  • Entrez Gene IDs:
    6737 (Human); 20821 (Mouse); 308901 (Rat)
  • Alternate Names:
    52 kDa ribonucleoprotein autoantigen Ro/SS-A; 52 kDa Ro/SSA; E3 ubiquitin-protein ligase TRIM21; EC 6.3.2.-; RNF81; RNF81RING finger protein 81; ro(SS-A); Ro52; RO52SS-A; Sicca syndrome antigen A; Sjoegren syndrome type A antigen; Sjogren syndrome antigen A1 (52kDa, ribonucleoprotein autoantigen SS-A/Ro); SSA1; SSA1SSA; TRIM21; tripartite motif containing 21,52 kDa Ro protein; tripartite motif-containing 21; Tripartite motif-containing protein 21
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