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分子别名（Synonym）
RSPO1, CRISTIN3, FLJ40906, RP11-566C13.1, R-spondin-1
表达区间及表达系统（Source）
Human R-Spondin 1, His Tag (RS1-H4221) is expressed from human 293 cells (HEK293). It contains AA Ser 21 - Ala 263 (Accession # Q2MKA7-1).
Predicted N-terminus: Ser 21
Request for sequence蛋白结构（Molecular Characterization）
Other Tags and Version Biotin & Other Labeled Version
This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 28.7 kDa. The protein migrates as 38-42 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 / rFC method.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 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）
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数据展示
电泳（SDS-PAGE）
Human R-Spondin 1, His 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 R-Spondin 1, His Tag (Cat. No. RS1-H4221) at 5 μg/mL (100 μL/well) can bind Human SCARB2, Fc Tag (Cat. No. SC2-H5250) with a linear range of 0.02-1.25 μg/mL (QC tested).
Protocol
Immobilized Human R-Spondin 1, His Tag (Cat. No. RS1-H4221) at 5 μg/mL (100 μL/well) can bind Biotinylated Human CD36, His,Avitag (Cat. No. CD6-H82E9) with a linear range of 0.01-1.25 μg/mL (Routinely tested).
Protocol
Immobilized Human R-Spondin 1, His Tag (Cat. No. RS1-H4221) at 5 μg/mL (100 μL/well) can bind Human LRP-6 (20-630), Mouse IgG2a Fc Tag (Cat. No. LR6-H5253) with a linear range of 1-20 ng/mL (Routinely tested).
Protocol
活性（Bioactivity）-CELL BASE
Human R-Spondin 1, His Tag (Cat. No. RS1-H4221) induced TCF reporter activity in HEK293 cells. The EC50 for this effect is 0.0035-0.0040 µg/mL (Routinely tested).
Protocol
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