大鼠β防御素-4|5ug|cyt-066-上海希美化学有限公司

大鼠β防御素-4

参考价：¥800

供货周期：

一周

品牌：

规格：

5ug

货号：

cyt-066

CAS号：

产品详情

大鼠β防御素-4

Recombinant Rat Beta Defensin -4

rBD 4

Catalogue Number

CYT-066

Synonyms

Beta-defensin 4, BD-4, BD-2, Defensin, beta 4, RBD-2, RBD-4, Defb4, Defb2, Defb3.

Introduction

Defensins are cationic peptides with a large spectrum of antimicrobial activity that comprise an important arm of the innate immune system. The Alpha defensins are differentiated from the Beta-defensins by the pairing of their 3 disulfide bonds.

4 human Beta-defensins have been identified to date; BD-1, BD-2, BD-3 and BD-4.

Beta-defensins are expressed on some leukocytes and at epithelial surfaces.

In addition to their direct antimicrobial activities, they are chemoattractant towards immature dendritic cells and memory T cells. The beta-defensin proteins are expressed as the C-terminal portion of precursors and are released by proteolytic cleavage of a signal sequence and, in the case of BD-1 (36 a.a.), a propeptide region. Beta-defensins contain a six-cysteine motif that forms three intra-molecular disulfide bonds. Beta-Defensins are 3-5 kDa peptides ranging in size from 33-47 amino acid residues.

Description

BD-4 Rat Recombinant produced in E.coli is a single, non-glycosylated polypeptide chain containing 41 amino acids and having a molecular mass of 4.4kDa.

The BD-4 is purified by proprietary chromatographic techniques.

Source

Escherichia Coli.

Physical Appearance

Sterile Filtered White lyophilized (freeze-dried) powder.

Formulation

BD-4 protein was lyophilized from a 0.2µm filtered concentrated solution in PBS, pH 7.4.

Solubility

It is recommended to reconstitute the lyophilized BD-4 in sterile 18M?-cm H₂O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.

Stability

Lyophilized BD-4 although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution BD-4 should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).

Please prevent freeze-thaw cycles.

Purity

Greater than 97.0% as determined by SDS-PAGE.

Biological Activity

Measured by its antimicrobial activity against E. coli. The ED50 for this effect is typically 5-50?g/ml.

Amino acid sequence

QSINNPITCL TKGGVCWGPC TGGFRQIGTC GLPRVRCCKK K.

Usage

ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. They may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.