膜杰作
Star Staining
分子别名（Synonym）
IL-31 RA,IL-31RA,hGLM-R,CRL3,GPL,ZcytoR17,GLM-R,IL-31R-alpha,Gp130-like receptor
表达区间及表达系统（Source）
Human IL-31 RA, Fc Tag (ILA-H5256) is expressed from human 293 cells (HEK293). It contains AA Ala 20 - Glu 519 (Accession # Q8NI17-1).
Predicted N-terminus: Ala 20
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries a human IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 83.5 kDa. The protein migrates as 105-115 kDa when calibrated against Star Ribbon Pre-stained Protein Marker 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）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5 with trehalose as protectant.
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.
质量管理控制体系（QMS）
电泳（SDS-PAGE）
Human IL-31 RA, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).
活性（Bioactivity）-ELISA
Immobilized Human IL-31, His Tag (Cat. No. IL1-H5247) at 1 μg/mL (100 μL/well) can bind Human IL-31 RA, Fc Tag (Cat. No. ILA-H5256) with a linear range of 0.01-0.313 μg/mL (QC tested).
Protocol
活性（Bioactivity）-SPR
Human IL-31, His Tag (Cat. No. IL1-H5247) capture on NTA-Series S sensor chip can bind Human IL-31 RA, Fc Tag (Cat. No. ILA-H5256) with an affinity constant of 37.1 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).
Protocol
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背景（Background）
Interleukin-31 receptor subunit alpha is a protein that in humans is encoded by the IL31RA gene, also known as IL-31 receptor subunit alpha, IL-31RA, GLM-R, Gp130-like receptor, CRL3, GPL. Oncostatin M receptor (OSMR) and IL31RA form the heterodimeric receptor through which IL31 signals. IL31RA is a strong activator of STAT3 and STAT5, whereas STAT1 is only marginally tyrosine-phosphorylated. dditionally, demonstrate Jak1 binding to GPL and its activation in heteromeric complexes with the OSMRbeta but also in a homomeric receptor complex.
