SRP3020
sCD22 human
recombinant, expressed in CHO cells, ≥98% (SDS-PAGE), ≥98% (HPLC), suitable for cell culture
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Synonym(s):
B-Lymphocyte cell adhesion molecule, BL-CAM, Leu-14, Siglec-2
UNSPSC Code:
12352202
NACRES:
NA.32
biological source
human
recombinant
expressed in CHO cells
assay
≥98% (HPLC)
≥98% (SDS-PAGE)
form
lyophilized
potency
10-17 μg/mL ED50
mol wt
75.0 kDa
packaging
pkg of 20 μg
technique(s)
cell culture | mammalian: suitable
impurities
<0.1 EU/μg endotoxin, tested
color
white
UniProt accession no.
shipped in
wet ice
storage temp.
−20°C
Gene Information
human ... CD22(933)
General description
CD22 is a B-lineage restricted 135 kDa glycoprotein whose cell surface expression is limited to resting and activated B lymphocytes. The physiological role of CD22 is still unknown. Targeted disruption of CD22 in mice results in a reduced level of surface IgM on peripheral B cells suggesting a role for CD22 in limiting antigen receptor signaling. CD22 is a member of the Ig gene superfamily that uniquely binds a sialic acid-dependent ligand. Recombinant Human sCD22 is a soluble 75.0 kDa protein which corresponds to the extracellular domain of CD22.
Biochem/physiol Actions
CD22 is a B-lineage restricted 135 kDa glycoprotein whose cell surface expression is limited to resting and activated B lymphocytes. Recombinant Human sCD22 is a soluble 75.0 kDa protein which corresponds to the extracellular domain of CD22.
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
Physical form
Lyophilized from 1x PBS, pH 7.2.
Reconstitution
Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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Alessandra Cesano et al.
Seminars in oncology, 30(2), 253-257 (2003-04-30)
CD22 is a 135-kd B-cell restricted sialoglycoprotein present in the cytoplasm of virtually all B-lineage cells but expressed on the B-cell surface only at mature stages of differentiation. In humans, the vast majority of IgM(+)IgD(+) B cells express cell-surface CD22
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