Positive control:
Lane 1: Raji cell lysate
Lane 2: Daudi cell lysate
Applications
-
WB
-
IHC-P
-
FC
REACTIVITY
-
Human
SPECIFICATIONS
Product Type
Mouse monoclonal primary
Product Name
CD22 Mouse Monoclonal Antibody [A2G6] (EM1902-13)
Immunogen
Recombinant protein within human cd22 aa 20-200.
Host
Mouse
Positive Control
Raji cell lysate, Daudi cell lysate, human spleen tissue, Daudi.
Conjugation
Unconjugated
Clonality
Monoclonal
Clone Number
A2G6
PROPERTIES
Form
Liquid
Storage Condition
Store at +4C after thawing. Aliquot store at -20C. Avoid repeated freeze / thaw cycles.
Storage Buffer
1*PBS (pH7.4), 0.2% BSA, 50% Glycerol. Preservative: 0.05% Sodium Azide.
Concentration
2 ug/ul
PURIFICATION
Protein G affinity purified.
MOLECULAR WEIGHT
Predicted band size: 95 kDa
Isotype
IgG1
APPLICATION DILUTION
-
WB:1:500-1:1,000
-
IHC-P:1:50-1:200
-
FC:1:50-1:100
TARGET
UNIPROT #
PROTEIN NAME
CD22
SYNONYMS
B cell receptor CD22 precursor antibody; B lymphocyte cell adhesion molecule antibody; B-cell receptor CD22 antibody; B-lymphocyte cell adhesion molecule antibody; BL CAM antibody; BL-CAM antibody; BLCAM antibody; CD 22 antibody; CD22 antibody; CD22 antigen antibody; CD22 molecule antibody; CD22 protein antibody; CD22_HUMAN antibody; Lectin 2 antibody; Leu14 antibody; Lyb8 antibody; MGC130020 antibody; sialic acid binding Ig like lectin 2 antibody; Sialic acid binding immunoglobulin like lectin 2 antibody; Sialic acid-binding Ig-like lectin 2 antibody; SIGLEC 2 antibody; Siglec-2 antibody; SIGLEC2 antibody; T cell surface antigen Leu 14 antibody; T-cell surface antigen Leu-14 antibody
SEQUENCE SIMILARITIES
Belongs to the immunoglobulin superfamily. SIGLEC (sialic acid binding Ig-like lectin) family.
TISSUE SPECIFICITY
B-lymphocytes.
POST-TRANSLATIONAL MODIFICATION
Phosphorylation of Tyr-762, Tyr-807 and Tyr-822 are involved in binding to SYK, GRB2 and SYK, respectively. Phosphorylation of Tyr-842 is involved in binding to SYK, PLCG2 and PIK3R1/PIK3R2.; Phosphorylated on tyrosine residues by LYN.
SUBCELLULAR LOCATION
Cell membrane.
FUNCTION
CD22, or cluster of differentiation-22, is a molecule belonging to the SIGLEC family of lectins. It is found on the surface of mature B cells and to a lesser extent on some immature B cells. Generally speaking, CD22 is a regulatory molecule that prevents the overactivation of the immune system and the development of autoimmune diseases. CD22 is a sugar binding transmembrane protein, which specifically binds sialic acid with an immunoglobulin (Ig) domain located at its N-terminus. The presence of Ig domains makes CD22 a member of the immunoglobulin superfamily. CD22 functions as an inhibitory receptor for B cell receptor (BCR) signaling. Mediates B-cell B-cell interactions. May be involved in the localization of B-cells in lymphoid tissues. Binds sialylated glycoproteins; one of which is CD45. Preferentially binds to alpha-2,6-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. 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.