Biotinylated Human TNF-alpha Protein, epitope tag free, ultra sensitivity (primary amine labeling) (active trimer) (MALS verified)

分子别名（Synonym）

DIF,TNF-alpha,TNFA,TNFSF2,cachexin,cachectin,TNFα

表达区间及表达系统（Source）

MABSol® Biotinylated Human TNF-alpha, epitope tag free, primary amine labeling (active trimer) (MALS verified)  is expressed from human HEK293 cells. It contains AA Val 77 - Leu 233. It is the biotinylated form of ActiveMax® Human TNF-alpha, Tag Free, low endotoxin (active trimer) (MALS verified).

Predicted N-terminus: Val 77

Request for sequence

蛋白结构（Molecular Characterization）

The product does NOT contain any epitope tags. The protein has a calculated MW of 17.4 kDa. The protein migrates as 18 kDa on a SDS-PAGE gel under reducing (R) condition.

标记（Biotinylation）

The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with biotins using standard chemical labeling method. A standard biotin reagent (13.5 angstroms) is used in this product.

蛋白标记度（Biotin:Protein Ratio)

Passed as determined by the HABA assay / binding ELISA.

内毒素（Endotoxin）

Less than 1.0 EU per μg by the LAL method.

纯度（Purity）

>95% as determined by SDS-PAGE.

>95% 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:

1. -20°C to -70°C for 12 months in lyophilized state;

2. -70°C for 3 months under sterile conditions after reconstitution.

电泳（SDS-PAGE）

Biotinylated Human TNF-alpha, epitope tag free, primary amine labeling on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

SEC-MALS

The purity of Biotinylated Human TNF-alpha, epitope tag free, primary amine labeling (active trimer) (MALS verified)  is more than 95% in HP-SEC, and the molecular weight of this protein is around 48-65 kDa verified by SEC-MALS.

Report

活性（Bioactivity）-ELISA

Immobilized Humira at 5 μg/mL (100 μL/well) can bind Biotinylated Human TNF-alpha, epitope tag free, primary amine labeling (active trimer) (MALS verified)  with a linear range of 0.4-6 ng/mL (QC tested).

Protocol

Immobilized Human TNFR1, Fc Tag at 5 μg/mL (100 μL/well) can bind Biotinylated Human TNF-alpha, epitope tag free, primary amine labeling (active trimer) (MALS verified)  with a linear range of 0.4-6 ng/mL (Routinely tested).

特别提示：本公司的所有产品仅可用于科研实验，严禁用于临床医疗及其他非科研用途！