Gibco™ Human Siglec-2 (CD22) (soluble) Recombinant Protein, PeproTech®

Catalog No.	Quantity
10001250UG	250 μg
10001100UG	100 μg
100-01-1MG	1 mg
100-01-20UG	20 μg
10001500UG	500 μg
100-01-5UG	5 μg

Catalog No. 10001250UG Supplier Gibco™ Supplier No. 10001250UG

Description

Recombinant Protein

Recombinant Human CD22 is a soluble 75.0 kDa protein which corresponds to the extracellular domain of CD22. This product is shipped at ambient temperature. For storage, handling and reconstitution information, please see the lot-specific Certificate of Analysis

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 Hodgkin’s lymphoma, but negative in classical Hodgkin’s lymphoma.

Specifications

• Accession Number: P20273
• For Use With (Application): ELISA, Functional Assay, Western Blot
• Formulation: protein with no preservative
• Gene ID (Entrez): 933
• Molecular Weight (g/mol): 75 kDa
• Name: Human Siglec-2 (CD22) (soluble)
• Quantity: 250 μg
• Source: CHO cells
• Regulatory Status: RUO
• Endotoxin Concentration: <1 EU/ μg
• Gene Alias: A530093D23; B-cell receptor CD22; BL-CAM; B-lymphocyte cell adhesion molecule; B-lymphocyte cell adhesion molecule (BL-CAM); Cd22; CD22 antigen; CD22 molecule; FLJ22814; Lectin 2; Leu-14; Lyb8; Lyb-8; MGC130020; sialic acid binding Ig-like lectin 2; sialic acid-binding Ig-like lectin 2; Sialic acid-binding Ig-like lectin 2 (Siglec-2); Siglec2; Siglec-2; T-cell surface antigen Leu-14
• Common Name: CD22
• Gene Symbol: CD22
• Biological Activity: Determined by its ability to inhibit the proliferation of Raji cells. The expected ED50 for this effect is 10-17 ug/ml
• Conjugate: Unconjugated
• Recombinant: Recombinant
• Sequence: SKWVFEHPET LYAWEGACVW IPCTYRALDG DLESFILFHN PEYNKNTSKF DGTRLYESTK DGKVPSEQKR VQFLGDKNKN CTLSIHPVHL NDSGQLGLRM ESKTEKWMER IHLNVSERPF PPHIQLPPEI QESQEVTLTC LLNFSCYGYP IQLQWLLEGV PMRQAAVTST SLTIKSVFTR SELKFSPQWS HHGKIVTCQL QDADGKFLSN DTVQLNVKHT PKLEIKVTPS DAIVREGDSV TMTCEVSSSN PEYTTVSWLK DGTSLKKQNT FTLNLREVTK DQSGKYCCQV SNDVGPGRSE EVFLQVQYAP EPSTVQILHS PAVEGSQVEF LCMSLANPLP TNYTWYHNGK EMQGRTEEKV HIPKILPWHA GTYSCVAENI LGTGQRGPGA ELDVQYPPKK VTTVIQNPMP IREGDTVTLS CNYNSSNPSV TRYEWKPHGA WEEPSLGVLK IQNVGWDNTT IACARCNSWC SWASPVALNV QYAPRDVRVR KIKPLSEIHS GNSVSLQCDF SSSHPKEVQF FWEKNGRLLG KESQLNFDSI SPEDAGSYSC WVNNSIGQTA SKAWTLEVLY APRRLRVSMS PGDQVMEGKS ATLTCESDAN PPVSHYTWFD WNNQSLPHHS QKLRLEPVKV QHSGAYWCQG TNSVGKGRSP LSTLTVYYSP ETIGRR
• Content And Storage: -20°C
• Expression System: CHO cells
• Form: Lyophilized
• Purity or Quality Grade: ≥ 98% by SDS-PAGE gel and HPLC analyses.