Thermo Fisher Scientific CD22 Monoclonal Antibody (RFB-4), APC

Applications

Tested Dilution

Publications

Flow Cytometry (Flow)

Assay-Dependent

View 1 publication 1 publication

Product Specifications

Species Reactivity

Human

Published species

Not Applicable

Host/Isotype

Mouse / IgG1

Class

Monoclonal

Type

Antibody

Clone

RFB-4

Immunogen

Human CD22

Conjugate

APC APC APC

View additional formats

• FITC
• PE
• Request custom conjugation

Excitation/Emission Max

651/660 nm View spectra

Form

Liquid

Purification

purified

Storage buffer

PBS with 10% sucrose, BSA

Contains

0.1% sodium azide

Storage conditions

4° C, store in dark

Shipping conditions

Ambient (domestic); Wet ice (international)

RRID

AB_10373253

Product Specific Information

Allophycocyanin (APC) is a stable and highly soluble phycobiliprotein that provides maximal absorbance and fluorescence without susceptibility to internal or external fluorescence quenching, thus providing exceptional quantum yields and molar extinction coefficients.

Target Information

CD22 (BL-CAM) is a type 1 integral membrane glycoprotein with molecular weight of 130 to 140 kDa. CD22 is expressed in both the cytoplasm and cell membrane of B-lymphocytes. CD22 antigen appears early in B-cell lymphocyte differentiation at approximately the same stage as the CD19 antigen. Unlike other B-cell markers, CD22 membrane expression is limited to the late differentiation stages comprised between mature B cells (CD22+) and plasma cells (CD22-), and may thus prove useful in phenotyping mature leukemias. CD22 is also strongly expressed in hairy cell leukemia. CD22 preferentially binds to alpha2,6-linked sialic acid. The sialic acid recognition site can be masked by cis interactions with sialic acids on the same cell surface. Upon ligand induced tyrosine phosphorylation in the immune response seems to be involved in regulation of B cell antigen receptor signaling. CD22 plays a role in positive regulation through interaction with Src family tyrosine kinases and may also act as an inhibitory receptor by recruiting cytoplasmic phosphatases via their SH2 domains that block signal transduction through dephosphorylation of signaling molecules. CD22 is also strongly expressed in hairy cell leukemia. CD22 is also positive in diffuse large B-cell lymphoma and nodular lymphocyte predominance Hodgkins lymphoma, but negative in classical Hodgkins lymphoma.

Analyte Specific Reagent