Key Product Details

Validated by

Biological Validation

Species Reactivity

Validated:

Mouse

Cited:

Mouse, Transgenic Mouse

Applications

Validated:

Intracellular Staining by Flow Cytometry, Immunocytochemistry, CyTOF-ready

Cited:

Immunohistochemistry, Immunohistochemistry-Paraffin, Immunohistochemistry-Frozen, Immunocytochemistry/ Immunofluorescence

Label

Unconjugated

Antibody Source

Polyclonal Sheep IgG
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Product Specifications

Immunogen

E. coli-derived recombinant mouse Spi-B
Tyr18-Glu167 (Tyr110Phe)
Accession # O35906

Specificity

Detects mouse Spi-B in direct ELISAs. In direct ELISAs, less than 2% cross-reactivity with recombinant human Spi-B is observed.

Clonality

Polyclonal

Host

Sheep

Isotype

IgG

Scientific Data Images for Mouse Spi-B Antibody

Spi-B antibody in Mouse Splenocytes by Immunocytochemistry (ICC).

Spi-B in Mouse Splenocytes.

Spi-B was detected in immersion fixed mouse splenocytes using Sheep Anti-Mouse Spi-B Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7204) at 15 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Sheep IgG Secondary Antibody (red; Catalog # NL010) and counterstained with DAPI (blue). Specific staining was localized to plasma membranes and cytoplasm. View our protocol for Fluorescent ICC Staining of Non-adherent Cells.
Detection of SPi-B antibody in Mouse Splenocytes antibody by Flow Cytometry.

Detection of SPi-B in Mouse Splenocytes by Flow Cytometry.

Mouse splenocytes were stained with Sheep Anti-Mouse Spi-B Antigen Affinity-purified Polyclonal Antibody (Catalog # AF7204) followed by Allophycocyanin-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # F0127) and Rat Anti-Mouse B220/CD45R PE-conjugated Monoclonal Antibody (Catalog # FAB1217P). Quadrant markers were set based on control antibody staining (Catalog # 5-001-A). To facilitate intracellular staining, cells were fixed with paraformadehyde and permeabilized with saponin.
Detection of Mouse Spi-B by Immunocytochemistry/Immunofluorescence

Detection of Mouse Spi-B by Immunocytochemistry/Immunofluorescence

OPGhigh M cells cluster more in cecal patches than in Peyer’s patches.a Whole-mount immunostaining of the FAE of Peyer’s patches (left) and cecal patches (right) for OPG (green) and Spi-B (red). Nuclei were stained with DAPI (blue); scale bars: 50 µm. b Scatter plots of the fluorescence intensities of OPG versus Spi-B. Red dots represent cells stained with anti-Spi-B antibody that was conjugated with HyLyte Fluor 555 and anti-OPG antibody that was conjugated with HyLyte Fluor 647. Blue dots represent background fluorescence intensity of randomly selected non-stained cells. Fluorescence intensities were measured for at least 3000 cells from five FAEs of three mice. c Frequencies of OPGhigh M cells in Peyer’s patches and cecal patches were quantified. *p < 0.05, ***p < 0.005. Student’s t-test, n = 5 FAE from three animals. The source data underlying panels b and c are provided as a Source Data file. Image collected and cropped by CiteAb from the following publication (https://pubmed.ncbi.nlm.nih.gov/31932605), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of Mouse Spi-B by Immunocytochemistry/Immunofluorescence

Detection of Mouse Spi-B by Immunocytochemistry/Immunofluorescence

RANKL–RANK signaling is stimulated in the gut epithelia of Opg−/− mice.a GP2+ cells (red) are more effectively induced in the cecal epithelium (CE) and ileal villi (VE) of Opg−/− mice by RANKL administration. Whole-mount immunohistochemical images of Spi-B (green) and GP2 (red) in the VE and CE of WT (upper panels) and Opg−/− mice (lower panels) treated with either GST (control; left) or GST-RANKL (right). Scale bars: 100 µm. Representative images from three independent experiment are shown. b Quantitative PCR analysis of M-cell marker expression in conventional epithelia from the VE and CE of mice injected with GST (control) or GST-RANKL. Results were normalized to Gapdh expression and are presented relative to the expression in the ileal epithelium from GST-treated mice. Data shown are mean values from three independent experiments (error bars indicate standard deviation). ***p < 0.005, **p < 0.01, *p < 0.05; p values were calculated with the Student’s t-test (n = 3 biologically independent experiments). c, d Nuclear translocation activities of RelB and p52 following RANKL stimulation are enhanced in Opg−/− mice. c Western blot analysis of p100/p52 and RelB in the VE and CE of mice injected with GST or GST-RANKL. Rpt4, a subunit of the 26S proteasome, was used as an internal control for the cytoplasmic fraction. Lamin A/C (Lamin) was used as an internal control for the nuclear fraction. Data are representative of two independent experiments. d Right, single confocal planes of the cecal FAE from WT and Opg−/− mice. FAE monolayers were stained with anti-RelB (green) and anti-Spi-B (red) antibodies and with Hoechst 33342. Left, a bar graph summarizing the proportions of RelB-positive cells among total numbers of M cells (Spi-B-positive cells). ***p < 0.005; p values were calculated with the Student’s t-test (n = 4 biologically independent experiments). Scale bars: 20 µm. The source data underlying panels b and d and non-cropped scan images of western blotting (c) are provided as a Source Data file. Image collected and cropped by CiteAb from the following publication (https://pubmed.ncbi.nlm.nih.gov/31932605), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of Mouse Spi-B by Immunocytochemistry/Immunofluorescence

Detection of Mouse Spi-B by Immunocytochemistry/Immunofluorescence

RANKL–RANK signaling is stimulated in the gut epithelia of Opg−/− mice.a GP2+ cells (red) are more effectively induced in the cecal epithelium (CE) and ileal villi (VE) of Opg−/− mice by RANKL administration. Whole-mount immunohistochemical images of Spi-B (green) and GP2 (red) in the VE and CE of WT (upper panels) and Opg−/− mice (lower panels) treated with either GST (control; left) or GST-RANKL (right). Scale bars: 100 µm. Representative images from three independent experiment are shown. b Quantitative PCR analysis of M-cell marker expression in conventional epithelia from the VE and CE of mice injected with GST (control) or GST-RANKL. Results were normalized to Gapdh expression and are presented relative to the expression in the ileal epithelium from GST-treated mice. Data shown are mean values from three independent experiments (error bars indicate standard deviation). ***p < 0.005, **p < 0.01, *p < 0.05; p values were calculated with the Student’s t-test (n = 3 biologically independent experiments). c, d Nuclear translocation activities of RelB and p52 following RANKL stimulation are enhanced in Opg−/− mice. c Western blot analysis of p100/p52 and RelB in the VE and CE of mice injected with GST or GST-RANKL. Rpt4, a subunit of the 26S proteasome, was used as an internal control for the cytoplasmic fraction. Lamin A/C (Lamin) was used as an internal control for the nuclear fraction. Data are representative of two independent experiments. d Right, single confocal planes of the cecal FAE from WT and Opg−/− mice. FAE monolayers were stained with anti-RelB (green) and anti-Spi-B (red) antibodies and with Hoechst 33342. Left, a bar graph summarizing the proportions of RelB-positive cells among total numbers of M cells (Spi-B-positive cells). ***p < 0.005; p values were calculated with the Student’s t-test (n = 4 biologically independent experiments). Scale bars: 20 µm. The source data underlying panels b and d and non-cropped scan images of western blotting (c) are provided as a Source Data file. Image collected and cropped by CiteAb from the following publication (https://pubmed.ncbi.nlm.nih.gov/31932605), licensed under a CC-BY license. Not internally tested by R&D Systems.

Applications for Mouse Spi-B Antibody

Application
Recommended Usage

CyTOF-ready

Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

Immunocytochemistry

5-15 µg/mL
Sample: Immersion fixed mouse splenocytes

Intracellular Staining by Flow Cytometry

2.5 µg/106 cells
Sample: Mouse splenocytes fixed with paraformadehyde and permeabilized with saponin

Flow Cytometry Panel Builder

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Save time and reduce costly mistakes by quickly finding compatible reagents using the Panel Builder Tool.

Advanced Features

  • Spectra Viewer - Custom analysis of spectra from multiple fluorochromes
  • Spillover Popups - Visualize the spectra of individual fluorochromes
  • Antigen Density Selector - Match fluorochrome brightness with antigen density
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Formulation, Preparation, and Storage

Purification

Antigen Affinity-purified

Reconstitution

Sterile PBS to a final concentration of 0.2 mg/mL. For liquid material, refer to CoA for concentration.


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Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

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.

Calculators

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: Spi-B

Spi-B (Transcription factor Spi-B) is a 33-45 kDa member of the ets family of transcription factors. It is found in hematopoietic cells such as B cells and plasmacytoid dendritic cells (DC). In transitional B cells, Spi-B promotes their differentiation into follicular (naïve) B cells. In hematopoietic stem cells, Spi-B stimulates the generation of IFN-producing plasmacytoid DC at the expense of T, B and NK cell development. Mouse Spi-B is 267 amino acids (aa) in length. It contains a dual transactivation region (aa 1-62), plus a PEST domain (aa 110-170) and an Ets DNA-binding domain (aa 174-257). There are two isoform variants. One shows a nine aa substitution for aa 1-8, while a second possesses an 18 aa insertion after Leu17. Over aa 18-167, mouse Spi-B shares 91% and 74% aa identity with rat and human Spi-B, respectively.

Long Name

Transcription Factor Spi [Spleen FFV Proviral Integration Oncogene] B

Alternate Names

SpiB

Entrez Gene IDs

6689 (Human); 272382 (Mouse); 499146 (Rat)

Gene Symbol

SPIB

UniProt

Additional Spi-B Products

Product Documents for Mouse Spi-B Antibody

Certificate of Analysis

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Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Mouse Spi-B Antibody

For research use only

Citations for Mouse Spi-B Antibody

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Protocols

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Associated Pathways

Dendritic Cell Lineage Development Pathways Dendritic Cell Lineage Development Pathway Thumbnail