Thermo Fisher Scientific SPI-B Monoclonal Antibody (235D), eBioscience

Applications

Tested Dilution

Publications

Western Blot (WB)

Assay-Dependent

-

Immunohistochemistry (Paraffin) (IHC (P))

5 µg/mL

-

Immunocytochemistry (ICC/IF)

Assay-Dependent

-

Product Specifications

Species Reactivity

Human

Host/Isotype

Mouse / IgG1, kappa

Class

Monoclonal

Type

Antibody

Clone

235D

Conjugate

Unconjugated Unconjugated Unconjugated

Form

Liquid

Concentration

0.5 mg/mL

Purification

Affinity chromatography

Storage buffer

PBS, pH 7.2

Contains

0.09% sodium azide

Storage conditions

4° C

Shipping conditions

Ambient (domestic); Wet ice (international)

RRID

AB_2865455

Product Specific Information

Description: The 235D monoclonal antibody recognizes human SPI-B. SPI-B is a member of the ETS transcription factor family which is comprised of DNA binding proteins that function in lymphoid development and activity. SPI-B binds the PU box, a purine-rich DNA sequence (5-GAGGAA-3). SPI-B is expressed in mature B cells, immature T cells, plasmacytoid dendritic cells, and microfold cells (M cells) of the intestine. In human tonsil tissue, high levels of SPI-B are expressed in plasmacytoid dendritic cells, while lower levels of expression are found in germinal center B cells.

Applications Reported: This 235D antibody has been reported for use in western blotting, immunohistochemical staining of formalin-fixed paraffin embedded tissue sections, microscopy, immunohistochemical staining, and immunocytochemistry.

Applications Tested: This 235D antibody has been tested by immunohistochemistry on formalin-fixed paraffin embedded human tissue using low pH antigen retrieval and can be used at less than or equal to 5 µg/mL. It is recommended that the antibody be carefully titrated for optimal performance in the assay of interest.

Purity: Greater than 90%, as determined by SDS-PAGE.

Aggregation: Less than 10%, as determined by HPLC.

Filtration: 0.2 µm post-manufacturing filtered.

Target Information

Spi-B is a transcription factor belonging to a subfamily of ETS transcription factors with a conserved ETS domain that mediates specific DNA binding. Spi-B may form homotypic interactions and is known to interact with IRF4, CREBBP, EP300, SPI1/PU.1 related, JUN and TBP. As a sequence specific transcriptional activator it binds to the PU-box, a purine-rich DNA sequence (5-GAGGAA-3) that can act as a lymphoid-specific enhancer. Two isoforms of Spi-B are reported. Spi-B is usually expressed in plasmacytoid dendritic cells (pDCs), also known as type 2 DC precursors (pre-DC2) or natural interferon (IFN)-producing cells and promotes their development and block viral replication. Spi-B is not expressed in T-cells or granulocytes but may be present in stem cell populations of the liver and B-cells where it helps in B-cell receptor (BCR) signaling, normal B-cell development and antigenic stimulation.

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