膜杰作
Star Staining
分子别名（Synonym）
leukosialin, sialophorin, GPL115, Galactoglycoprotein, GALGP, Leukocyte sialoglycoprotein
表达区间及表达系统（Source）
Human CD43, His Tag (CD3-H52H9) is expressed from human 293 cells (HEK293). It contains AA Ser 20 - Arg 253 (Accession # P16150-1 ).
Predicted N-terminus: Ser 20
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 25.3 kDa. The protein migrates as 45-80 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
电泳（SDS-PAGE）
Human CD43, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 90%.
SEC-MALS
The purity of Human CD43, His Tag(Cat. No. CD3-H52H9) is more than 90% and the molecular weight of this protein is around 38-48 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-SPR
Human Siglec-1, His Tag (Cat. No. SG1-H52H3) immobilized on CM5 Chip can bind Human CD43, His Tag (Cat. No. CD3-H52H9) with an affinity constant of 76.1 μM as determined in a SPR assay (Biacore 8K) (QC tested).
Protocol
背景（Background）
CD43 or leukosialin or sialophorin, is predominant cell surface sialoprotein of leukocytes which regulates multiple T-cell functions, including T-cell activation, proliferation, differentiation, trafficking and migration. In hematopathology, CD43 is often considered as a T-cell associated marker, because it is expressed by over 95% of thymocytes and peripheral blood T cells. CD43 positively regulates T-cell trafficking to lymph-nodes via its association with ERM proteins (EZR, RDX and MSN).
