活性BAFF 人，10UG，B0939-10UG，Sigma 供应商、价格、厂家、报价、规格参数

产品介绍 Product Description

General description

BAFF (B lymphocyte activating factor) is a member of the tumor necrosis factor (TNF) ligand family which is expressed in T Cells, macrophages, monocytes and dendritic cells. It is also known as BLyS, THANK, TALL, zTNF4 and TNFS20. BAFF enhances B cell survival in vitro and has emerged as a key regulator of peripheric B cell and it is vital homeostatic cytokine for B cells that helps regulate both innate and adaptive immune responses. BAFF binds to three TNF receptors: B-cell maturation antigen (BCMA/TNFRSF17), transmembrane activator and calcium modulator and cyclophilin ligand interactor(TACI/TNFRSF13B) and BAFF receptor (BAFF R/BR3/TNFRSF 13C).The human BAFF gene code for a 285 amino acids type II transmembrane protein. Recombinant human soluble BAFF is a 151 amino acids containing the TNF-like portion of the extracellular domain of BAFF.

Physical form

Lyophilized from a 20 mM PBS buffer at pH 7 and 0.2 M NaCl.

Preparation Note

Lyophilized protein should be reconstituted in water to a concentration of 25 - 50 ng /μl. Due to the protein nature, dimmers and multimers may be observed.

Analysis Note

The activity is determined by dose-dependeant stimulation of proliferation B cell from Human PBMC. Cell proliferation was measured by MTT method.
*activity results may vary with PBMC donors.
ED₅₀ ≤ 50 ng/mL

Other Notes

Extinction Coefficient: E^0.1% = 0.791 (A₂₈₀ nm)
p.I: 6.03

技术参数 Specifications

biological source	human
Quality Segment	200
recombinant	expressed in Nicotiana
assay	>97% (SDS-PAGE)
form	lyophilized
potency	≤50 ng/mL ED₅₀
mol wt	18-20 kDa (a glycosilated polypeptide chain containing 151 amino acids)
packaging	pkg of 10 μg
storage condition	avoid repeated freeze/thaw cycles
impurities	Endotoxin, tested (LAL test, < 0.04 EU/ ug protein)
UniProt accession no.	Q9Y275
storage temp.	−20°C
Gene Information	human ... TNFSF13B(10673)

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