Siglecs (sialic acid binding Ig-like lectins) are I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N-terminal Ig-like V-type domain which mediates sialic acid binding, followed by varying numbers of Ig-like C2-type domains. Human Siglec-2, also known as B-cell antigen CD22 or B-lymphocyte cell adhesion molecule (BL-CAM), is a B-cell restricted glycoprotein that is expressed in the cytoplasm of progenitor B and pre-B cells and on the surface of mature B cells. Two distinct human Siglec-2/CD22 cDNAs that arise from differential RNA processing of the same gene have been isolated. Siglec-2/CD22 is an adhesion molecule that preferentially binds alpha 2,6- linked sialic acid on the same (cis) or adjacent (trans) cells. Interaction of CD22 with trans ligands on opposing cells was found to be favored over the binding of ligands in cis.
Pack Size | Availability | Price/USD | Quantity |
---|---|---|---|
10 μg | 5 days | $ 129.00 | |
50 μg | 5 days | $ 390.00 | |
500 μg | 5 days | $ 1,900.00 | |
1 mg | 5 days | $ 2,730.00 |
Description | Siglecs (sialic acid binding Ig-like lectins) are I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N-terminal Ig-like V-type domain which mediates sialic acid binding, followed by varying numbers of Ig-like C2-type domains. Human Siglec-2, also known as B-cell antigen CD22 or B-lymphocyte cell adhesion molecule (BL-CAM), is a B-cell restricted glycoprotein that is expressed in the cytoplasm of progenitor B and pre-B cells and on the surface of mature B cells. Two distinct human Siglec-2/CD22 cDNAs that arise from differential RNA processing of the same gene have been isolated. Siglec-2/CD22 is an adhesion molecule that preferentially binds alpha 2,6- linked sialic acid on the same (cis) or adjacent (trans) cells. Interaction of CD22 with trans ligands on opposing cells was found to be favored over the binding of ligands in cis. |
Species | Human |
Expression System | Human Cells |
Tag | C-Fc |
Accession Number | P20273 |
Synonyms | BL-CAM, SIGLEC2FLJ22814, CD22 antigenMGC130020, sialic acid binding Ig-like lectin 2, B-lymphocyte cell adhesion molecule, T-cell surface antigen Leu-14, Siglec-2, CD22, B-cell receptor CD22, CD22 molecule |
Amino Acid | Asp20-Arg687 |
Construction | Recombinant Human B-cell Receptor CD22 is produced by our Mammalian expression system and the target gene encoding Asp20-Arg687 is expressed with a human IgG1 Fc tag at the C-terminus. |
Protein Purity | Greater than 95% as determined by reducing SDS-PAGE. (QC verified) |
Molecular Weight | 120-150 KDa, reducing conditions |
Endotoxin | Less than 0.1 ng/µg (1 EU/µg) as determined by LAL test. |
Formulation | Lyophilized from a 0.2 μm filtered solution of 20mM Tris-HCl, 1mM EDTA, 150mM NaCl, pH 8.0 . |
Reconstitution | Always centrifuge tubes before opening.Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles. |
Stability & Storage |
Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months. |
Shipping |
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature listed below. |
Research Background | Siglecs (sialic acid binding Ig-like lectins) are I-type (Ig-type) lectins belonging to the Ig superfamily. They are characterized by an N-terminal Ig-like V-type domain which mediates sialic acid binding, followed by varying numbers of Ig-like C2-type domains. Human Siglec-2, also known as B-cell antigen CD22 or B-lymphocyte cell adhesion molecule (BL-CAM), is a B-cell restricted glycoprotein that is expressed in the cytoplasm of progenitor B and pre-B cells and on the surface of mature B cells. Two distinct human Siglec-2/CD22 cDNAs that arise from differential RNA processing of the same gene have been isolated. Siglec-2/CD22 is an adhesion molecule that preferentially binds alpha 2,6- linked sialic acid on the same (cis) or adjacent (trans) cells. Interaction of CD22 with trans ligands on opposing cells was found to be favored over the binding of ligands in cis. |
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Siglec-2/CD22 Protein, Human, Recombinant (hFc) CD-22 CD22 antigenMGC-130020 CD22 antigenMGC 130020 BL-CAM SIGLEC2FLJ22814 SIGLEC2FLJ-22814 CD22 antigenMGC130020 sialic acid binding Ig-like lectin 2 B-lymphocyte cell adhesion molecule T-cell surface antigen Leu-14 Siglec-2 CD 22 CD22 SIGLEC2FLJ 22814 B-cell receptor CD22 CD22 molecule recombinant recombinant-proteins proteins protein