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 a-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.Doody G.M., Justement L.B., Delibrias C.C., Matthews R.J., Lin J., Thomas M.L., Fearon D.T. Science 269:242-244(1995) Tuscano J.M., Engel P., Tedder T.F., Agarwal A., Kehrl J.H.Eur. J. Immunol. 26:1246-1252(1996) Law C.L., Sidorenko S.P., Chandran K.A., Zhao Z., Shen S.H., Fischer E.H., Clark E.A.J. Exp. Med. 183:547-560(1996)
Host
Rabbit
Immunogen
Peptide sequence around aa.839~843 (N-V-D-Y-V) derived from Human CD22.
Raised In
Rabbit
Reactivity
Human
Regulatory
RUO
Relevance
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 a-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.
Doody G.M., Justement L.B., Delibrias C.C., Matthews R.J., Lin J., Thomas M.L., Fearon D.T. Science 269:242-244(1995) Tuscano J.M., Engel P., Tedder T.F., Agarwal A., Kehrl J.H.Eur. J. Immunol. 26:1246-1252(1996) Law C.L., Sidorenko S.P., Chandran K.A., Zhao Z., Shen S.H., Fischer E.H., Clark E.A.J. Exp. Med. 183:547-560(1996)
Species
Homo Sapiens (Human)
Specificity
The antibody detects endogenous level of total CD22 protein.
Subcellular Location
Cell membrane, Single-pass type I membrane protein
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.
Pathway
B cell receptor signaling pathway Hematopoietic cell lineage
Protein Families
Immunoglobulin superfamily, SIGLEC (sialic acid binding Ig-like lectin) family
Tissue Specificity
B-lymphocytes.
Buffer
Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Form
Supplied at 1.0mg/mL in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Format
liquid
Purification
Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide.
Purity
Antibodies were produced by immunizing rabbits with synthetic peptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific peptide.
Storage
Upon receipt, store at -20°C or -80°C. Avoid repeated freeze.