产品说明
一般描述
Defensins (alpha and beta) are cationic peptides with a broad spectrum of antimicrobial activity that comprise an important arm of the innate immune system. The α-defensins are distinguished from the β-defensins by the pairing of their three disulfide bonds. To date, four human b-defensins have been identified; BD-1, BD-2, BD-3 and BD-4. The β-defensin proteins are expressed as the C-terminal portion of precursors and are released by proteolytic cleavage of a signal sequence. b-defensins contain a six-cysteine motif that forms three intra-molecular disulfide bonds. β-defensins are 3-5 kDa peptides ranging in size from 33-47 amino acid residues. BD-4 is expressed in testis, stomach, uterus, neutrophils, thyroid, lung and kidney. In addition to its direct antimicrobial activities, BD-4 is chemoattractant towards human blood monocytes. Recombinant human BD-4 is a 6.0 kDa protein containing 50 amino acid residues.
Chemical structure: peptide
生化/生理作用
Defensins (alpha and beta) are cationic peptides with a broad spectrum of antimicrobial activity that comprise an important arm of the innate immune system. Recombinant human BD-4 is a 6.0 kDa protein containing 50 amino acid residues.
序列
EFELDRICGY GTARCRKKCR SQEYRIGRCP NTYACCLRKW DESLLNRTKP
外形
Lyophilized from 10 mM Acetic Acid.
重悬
Centrifuge the vial prior to opening. Reconstitute in 10 mM Acetic Acid to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8℃ for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20℃ to -80℃.
产品性质
| 生物来源 | human |
| 重组 | expressed in E. coli |
| 测定 | ≥98% (HPLC) |
| 形式 | lyophilized |
| 分子量 | 6.0 kDa |
| 包装 | pkg of 20 μg |
| technique(s) | cell culture | mammalian: suitable |
| 杂质 | <0.1 EU/μg endotoxin, tested |
| 颜色 | white to off-white |
| 适用性 | suitable for |
| UniProt登记号 | Q8WTQ1 |
| 抗生素抗菌谱 | fungi mycobacteria viruses |
| 作用机制 | cell membrane | interferes |
| 运输 | wet ice |
| 储存温度 | −20℃ |
| Gene Information | human ... DEFB104A(140596) |
安全信息
| 象形图 |  |
| 警示用语： | Warning |
| 危险声明 | H315 - H319 |
| 预防措施声明 | P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P337 + P313 |
| 危险分类 | Eye Irrit. 2 - Skin Irrit. 2 |
| 储存分类代码 | 11 - Combustible Solids |
| WGK | WGK 3 |
| 闪点(F) | Not applicable |
| 闪点(C) | Not applicable |
Sigma-Aldrich
m.cnreagent.com
