CD21 Recombinant Rabbit Monoclonal Antibody [SC0681]
cat.: ET1610-61
Product Type: Recombinant Rabbit monoclonal IgG, primary antibodies
Species reactivity: Human, Mouse, Rat
Applications: WB, IF-Cell, IHC-P, IP, FC, IF-Tissue
Clonality: Monoclonal
Clone number: SC0681
Form: Liquid
Storage condition: Shipped at 4℃. Store at +4℃ short term (1-2 weeks). It is recommended to aliquot into single-use upon delivery. Store at -20℃ long term.
Storage buffer: 1*TBS (pH7.4), 0.05% BSA, 40% Glycerol. Preservative: 0.05% Sodium Azide.
Concentration: 1ug/ul
Purification: Protein A affinity purified.
Molecular weight: Predicted band size: 113 kDa
Isotype: IgG
Immunogen: Synthetic peptide within Human CD21 aa 989-1033 / 1033.
Positive control: Raji cell lysate, K-562 cell lysate, Raji, human tonsil tissue, human spleen tissue, human lymph nodes tissue, mouse spleen tissue, rat spleen tissue.
Subcellular location: Membrane.
Recommended Dilutions:
  WB
  IF-Cell
  IHC-P
  IP
  FC
  IF-Tissue
1:5,000
1:50-1:200
1:50-1:800
Use at an assay dependent concentration.
1;1,000
1:50-1:1,000
Uniprot #: SwissProt: P20023 Human | P19070 Mouse
Alternative names: C3DR CD 21 CD21 Complement C3d receptor Complement component (3d/Epstein Barr virus) receptor 2 Complement receptor type 2 CR Cr2 CR2_HUMAN CVID7 EBV receptor EBV-R Epstein Barr virus receptor Epstein-Barr virus receptor EVBR SLEB9
Images
ET1610-61_1.jpg Fig1: Western blot analysis of CD21 on different lysates with Rabbit anti-CD21 antibody (ET1610-61) at 1/5,000 dilution.

Lane 1: Raji cell lysate
Lane 2: K-562 cell lysate (negative)

Lysates/proteins at 20 µg/Lane.

Predicted band size: 113 kDa
Observed band size: 150 kDa

Exposure time: 3 minutes;

4-20% SDS-PAGE gel.

Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ET1610-61) at 1/5,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1:50,000 dilution was used for 1 hour at room temperature.
ET1610-61_2.jpg Fig2: Immunocytochemistry analysis of Raji cells labeling CD21 with Rabbit anti-CD21 antibody (ET1610-61) at 1/100 dilution.

Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS for 5 minutes at room temperature, then blocked with 1% BSA in 10% negative goat serum for 1 hour at room temperature. Cells were then incubated with Rabbit anti-CD21 antibody (ET1610-61) at 1/100 dilution in 1% BSA in PBST overnight at 4 ℃. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. Nuclear DNA was labelled in blue with DAPI.

Beta tubulin (M1305-2, red) was stained at 1/100 dilution overnight at +4℃. Goat Anti-Mouse IgG H&L (iFluor™ 594, HA1126) was used as the secondary antibody at 1/1,000 dilution.
ET1610-61_3.jpg Fig3: Immunohistochemical analysis of paraffin-embedded human tonsil tissue using anti-CD21 antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0-8.4) for 20 minutes.The tissues were blocked in 5% BSA for 30 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1610-61, 1/50) for 30 minutes at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
ET1610-61_4.jpg Fig4: Immunohistochemical analysis of paraffin-embedded human spleen tissue with Rabbit anti-CD21 antibody (ET1610-61) at 1/800 dilution.

The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1610-61) at 1/800 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
ET1610-61_5.jpg Fig5: Immunohistochemical analysis of paraffin-embedded human lymph nodes tissue with Rabbit anti-CD21 antibody (ET1610-61) at 1/800 dilution.

The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1610-61) at 1/800 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
ET1610-61_6.jpg Fig6: Immunohistochemical analysis of paraffin-embedded mouse spleen tissue with Rabbit anti-CD21 antibody (ET1610-61) at 1/5,000 dilution.

The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1610-61) at 1/5,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
ET1610-61_7.jpg Fig7: Immunohistochemical analysis of paraffin-embedded rat spleen tissue with Rabbit anti-CD21 antibody (ET1610-61) at 1/5,000 dilution.

The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (ET1610-61) at 1/5,000 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
ET1610-61_8.jpg Fig8: Flow cytometric analysis of Raji cells labeling CD21.

Cells were fixed and permeabilized. Then stained with the primary antibody (ET1610-61, 1μg/mL) (red) compared with Rabbit IgG Isotype Control (green). After incubation of the primary antibody at +4℃ for an hour, the cells were stained with a iFluor™ 488 conjugate-Goat anti-Rabbit IgG Secondary antibody (HA1121) at 1/1,000 dilution for 30 minutes at +4℃. Unlabelled sample was used as a control (cells without incubation with primary antibody; black).
Note: All products are “FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE”.