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防御素β2(DEFb2)活性蛋白

Active Defensin Beta 2 (DEFb2)

B-DF2; DEFB2; BD2; DEF-B2; HBD2; DEFB102; HBD-2; SAP1; DEFB4A; DEFB4; Skin-Antimicrobial Peptide 1

  • 防御素β2(DEFb2)活性蛋白 产品包装(模拟)
  • 防御素β2(DEFb2)活性蛋白 产品包装(模拟)
  • 防御素β2(DEFb2)活性蛋白 Figure. Gene Sequencing (Extract)
  • APA072Hu01.png Figure. SDS-PAGE
  • 防御素β2(DEFb2)活性蛋白 Figure. Western Blot
  • Certificate 通过ISO 9001、ISO 13485质量体系认证

活性实验

Defensin Beta 2 (DEFb2) is a 7 kDa secreted protein. It exhibits antimicrobial activity against Gram-negative bacteria and Gram-positive bacteria, with highest activity against Gram-negative bacteria. Antimicrobial activity against P.aruginosa seems to be salt-sensitive and is reduced with high salt concentrations greater than 25 mM. The human DEFb2 cDNA encodes a 64 aa protein with a 23 aa signal sequence and a 41 aa mature sequence. Besides, Toll Like Receptor 4 (TLR4) has been identified as an interactor of DEFb2, thus a binding ELISA assay was conducted to detect the interaction of recombinant human DEFb2 and recombinant human TLR4. Briefly, DEFb2 was diluted serially in PBS with 0.01% BSA (pH 7.4). Duplicate samples of 100μl were then transferred to TLR4-coated microtiter wells and incubated for 1h at 37℃. Wells were washed with PBST and incubated for 1h with anti-DEFb2 pAb, then aspirated and washed 3 times. After incubation with HRP labelled secondary antibody for 1h at 37℃, wells were aspirated and washed 5 times. With the addition of substrate solution, wells were incubated 15-25 minutes at 37℃. Finally, add 50µL stop solution to the wells and read at 450/630nm immediately. The binding activity of DEFb2 and TLR4 was shown in Figure 1, the EC50 for this effect is 0.11 ug/mL.

用法

Reconstitute in 10mM PBS (pH7.4) to a concentration of 0.1-1.0 mg/mL. Do not vortex.

储存

避免反复冻融。2-8°C不超过一个月,-80°C不超过12个月。

稳定性

热稳定性以损失率显示。损失率是由加速降解试验决定,具体方法如下:在37°C孵育48小时,没有显著的降解或者沉淀产生。保质期内,在适当的条件下存储,损失率低于5%。

相关产品

编号 适用物种:Homo sapiens (Human,人) 应用(仅供研究使用,不用于临床诊断!)
APA072Hu01 防御素β2(DEFb2)活性蛋白 Cell culture; Activity Assays.
RPA072Hu01 防御素β2(DEFb2)重组蛋白 Positive Control; Immunogen; SDS-PAGE; WB.
PAA072Hu01 防御素β2(DEFb2)多克隆抗体 WB
LAA072Hu71 防御素β2(DEFb2)多克隆抗体(生物素标记) WB; IHC; ICC.
MAA072Hu22 防御素β2(DEFb2)单克隆抗体 WB; IHC; ICC; IP.
SEA072Hu 防御素β2(DEFb2)检测试剂盒(酶联免疫吸附试验法) Enzyme-linked immunosorbent assay for Antigen Detection.
LMA072Hu 防御素β2(DEFb2)等多因子检测试剂盒(流式荧光发光法) FLIA Kit for Antigen Detection.
KSA072Hu01 防御素β2(DEFb2)检测试剂盒DIY材料(酶联免疫吸附试验法) Main materials for "Do It (ELISA Kit) Yourself".

参考文献

杂志 参考文献
Livestock Science The effect of Lactobacillus on the expression of porcine β-defensin-2 in the digestive tract of piglets [ScienceDirect: S1871141311000126]
Appl Environ Microbiol. Modulation of Porcine β-Defensins 1 and 2 upon Individual and Combined Fusarium Toxin Exposure in a Swine Jejunal Epithelial Cell Line [Asm: Source]
Plos Pathogens HIF-1α Is Essential for Effective PMN Bacterial Killing, Antimicrobial Peptide Production and Apoptosis in?Pseudomonas aeruginosa?Keratitis [PubMed: PMC3715414]
British Journal of Nutrition Identification of sociodemographic and clinical factors associated with the levels of human β-defensin-1 and human β-defensin-2 in the human milk of Han Chinese [Pubmed: 24124699]
University of Waikato The Assessment of Vitamin D, Antimicrobial Peptides and Procalcitonin in Bronchiectasis [Waikato:Source]
Vaccine On birth single dose live attenuated OPV and BCG vaccination induces gut cathelicidin LL37 responses at 6 week of age: A natural experiment [Pubmed:25444792]
International Journal of Dairy Technology Concentration characteristics of bovine β-defensin 1 and 2 in fresh bovine milk and infant formula [Doi: 10.1111]
Molecular Nutrition Food Research Green tea polyphenol epigallocatechin-3-gallate improves epithelial barrier function by inducing the productionof antimicrobial peptide pBD-1 and pBD-2 in monolayers of porcine intestinal epithelial IPEC-J2 cells. [Pubmed:26991948]
Respiratory Research Vitamin D and allergic airway disease shape the murine lung microbiome in a sex-specific manner. [pubmed:27655266]
Key Engineering Materials The Level of Inflammatory Cytokines and Antimicrobial Peptides after Composite Material Implantation and Contamination with Bacterial Culture. [16629795]
Scientific Reports Measurements of AMPs in stratum corneum of atopic dermatitis and healthy skin–tape stripping technique [Pubmed:29374283]
Frontiers in Microbiology Swine-Derived Probiotic Lactobacillus plantarum Inhibits Growth and Adhesion of Enterotoxigenic Escherichia coli and Mediates Host Defense [Pubmed:29997590]
Journal of Dermatological Science Glyoxal-induced exacerbation of pruritus and dermatitis is associated with staphylococcus aureus colonization in the skin of a rat model of atopic dermatitis [Pubmed:29496360]
International Immunopharmacology Caprylic acid and nonanoic acid upregulate endogenous host defense peptides to enhance intestinal epithelial immunological barrier function via histone deacetylase … [Pubmed: 30342347]
拉脱维亚科学院院刊 Influence of Antibiotic-Impregnated Biomaterials on Inflammatory Cytokines []
Veterinary Research Bovine fetal mesenchymal stem cells exert antiproliferative effect against mastitis causing pathogen Staphylococcus aureus [Pubmed: 30975214]
Journal of Immunology Research Damage-Associated Molecular Patterns and Myeloid-Derived Suppressor Cells in Bronchoalveolar Lavage Fluid in Chronic Obstructive Pulmonary Disease Patients []
Veterinary Research Toll-like receptor 5-mediated IL-17C expression in intestinal epithelial cells enhances epithelial host defense against F4+ ETEC infection [Pubmed: 31221216]
Animals Fat Encapsulation Reduces Diarrhea in Piglets Partially by Repairing the Intestinal Barrier and Improving Fatty Acid Transport [33375218]
Sci Rep Human beta defensin levels and vaginal microbiome composition in post-menopausal women diagnosed with lichen sclerosus [34362937]
Medicine Regulatory T cells, damage-associated molecular patterns, and myeloid-derived suppressor cells in bronchoalveolar lavage fluid interlinked with chronic obstructive … [Pubmed:35687771]
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