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Biotinylated Human Siglec-2/CD22 Protein 5195



  • Expression: HEK293
  • Functional: Yes (ELISA)
  • Amino Acid Range: Asp20-Arg687
Weight1 lbs
Dimensions9 × 5 × 2 in
product tag

C-His-Avi, also biotinylated

Biotinylated Human Siglec-2/CD22 Protein 5195

Size and concentration
100, 500µg and lyophilized
Storage Instructions
Valid for 12 months from date of receipt when stored at -80°C. Recommend to aliquot the protein into smaller quantities for optimal storage. Please minimize freeze-thaw cycles.
Storage buffer
Shipped at ambient temperature.
> 95% as determined by Tris-Bis PAGE
target relevance
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. CD22 a member of the immunoglobulin superfamily. CD22 functions as an inhibitory receptor for B cell receptor (BCR) signaling. It is also involved in the B cell trafficking to Peyer's patches in mice.
Protein names
B-cell receptor CD22 (B-lymphocyte cell adhesion molecule) (BL-CAM) (Sialic acid-binding Ig-like lectin 2) (Siglec-2) (T-cell surface antigen Leu-14) (CD antigen CD22)
Gene names
Protein family
Immunoglobulin superfamily, SIGLEC (sialic acid binding Ig-like lectin) family
FUNCTION: 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.
Subellular location
SUBCELLULAR LOCATION: Cell membrane; Single-pass type I membrane protein.
SUBUNIT: Predominantly monomer of isoform CD22-beta. Also found as heterodimer of isoform CD22-beta and a shorter isoform. Interacts with PTPN6/SHP-1, LYN, SYK, PIK3R1/PIK3R2 and PLCG1 upon phosphorylation. Interacts with GRB2, INPP5D and SHC1 upon phosphorylation (By similarity). May form a complex with INPP5D/SHIP, GRB2 and SHC1. {ECO:0000250, ECO:0000269|PubMed:7618087, ECO:0000269|PubMed:8627166, ECO:0000269|PubMed:8647200}.
Post-translational modification
PTM: 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.; PTM: Phosphorylated on tyrosine residues by LYN. {ECO:0000250}.
Target Relevance information above includes information from UniProt accession : P20273
The UniProt Consortium


ELISA with Biotinylated Human Siglec-2/CD22 Protein
Immobilized Biotinylated Human Siglec-2, His Tag at 0.5µg/ml (100µl/Well) on the streptavidin precoated plate (5µg/ml). Dose response curve for Anti-Siglec-2 Antibody, hFc Tag with the EC50 of 9.8ng/ml determined by ELISA.
HPLC of Biotinylated Human Siglec-2/CD22 Protein
The purity of Biotinylated Human Siglec-2 is greater than 95% as determined by SEC-HPLC.
SDS-PAGE gel of Biotinylated Human Siglec-2/CD22 Protein
Biotinylated Human Siglec-2 on Tris-Bis PAGE under reduced condition. The purity is greater than 95%..


Published literature highly relevant to the biological target of this product and referencing this antibody or clone are retrieved from PubMed database provided by The United States National Library of Medicine at the National Institutes of Health.



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