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0.5mg/2mg/10mg/50mg
| 规格: | 0.5mg | 产品价格: | ¥968.0 |
|---|---|---|---|
| 规格: | 2mg | 产品价格: | ¥2898.0 |
| 规格: | 10mg | 产品价格: | ¥10998.0 |
| 规格: | 50mg | 产品价格: | ¥39998.0 |
| Species | Gene ID | Accession | Source | Length | MW | Tag |
| Streptomyces avidinii | X03591 | P22629 | E. coli | 128aa | 52kDa (tetramer) | - |
| 蛋白信息(About this protein) | |
| 名称(Name) | Recombinant Traptavidin (Streptavidin Mutant) |
| 别名(Synonyms) | Traptavidin;rTraptavidin;Streptavidin mutant;Streptavidin突变体;重组链霉亲和素突变体;链霉亲和素突变体;链霉抗生物素蛋白突变体 |
| 产品简介(Background) | Beyotime's Recombinant Traptavidin is a mutant of streptavidin, which was expressed in E. coli and purified. Compared to streptavidin, Traptavidin has about 10-fold lower off-rate from biotin (about 10-fold higher binding activity to biotin), increased mechanical and thermal stability [1]. The molecular mass for native Traptavidin is ~52kDa per tetramer, and denatured Traptavidin gives a major band at ~13kDa. |
| 产品用途(Applications) | Imaging of cell-surface proteins, DNA amplification and nanotechnology. |
| 外观(Physical appearance) | Sterile colorless liquid |
| 活性(Biological activity) | >17U/mg (one unit binds 1µg D-biotin) |
| 浓度(Concentration) | 2mg/ml |
| 纯度(Purity) | >98% by SDS-PAGE analysis |
| 储存液(Storage buffer) | Supplied as a 0.2μm filtered concentrated sterile solution in PBS. |
Traptavidin和Streptavidin相比具有更低的生物素解离速率、更高的热稳定性。在温度为37ºC、pH7.4的反应条件下,利用Biotin-4-Fluorescein测定Traptavidin和Streptavidin与生物素的解离速度,可见Traptavidin与生物素的解离速率(Dissociation %)明显更低,因此,Traptavidin与生物素的结合更为稳固(图1A)。Traptavidin加热至75ºC时仍能保持具有活性的四聚体(Tetramer),加热至80ºC以上才逐步解聚成失去活性的单体(Monomer),而Streptavidin四聚体的最高耐受温度仅为65ºC,因此,Traptavidin的热稳定性更好(图1B)。

图1. 碧云天Recombinant Traptavidin (Streptavidin Mutant) (P5082)相比于Recombinant Streptavidin (P5084)具有更低的生物素解离速率(更高的生物素结合活性)和更高的热稳定性。C为control,即95ºC加热处理10分钟,实验组为在不同温度(25-100ºC)条件下加热3分钟;*为四聚体(Tetramer),**为单体(Monomer)。实际检测结果可能会因样品和检测条件等的不同而存在差异,图中数据仅供参考。
本产品经SDS-PAGE电泳检测蛋白纯度和分子量请参考图2。

图2. 碧云天Recombinant Traptavidin (Streptavidin Mutant) (P5082)的SDS-PAGE电泳检测效果图。本蛋白经BeyoGel™ Plus PAGE预制胶(Tris-Gly, 15%, 10孔) (P0461)电泳,分子量Marker为BeyoColor™彩色预染蛋白分子量标准(6.5-270kD) (P0071/P0072),并经BeyoBlue™考马斯亮蓝超快染色液(P0017F)染色。Reduce,使用还原剂处理以解聚四聚体;Non-Reduce,未使用还原剂处理。实际检测结果可能会因样品和检测条件等的不同而存在差异,图中数据仅供参考。
包装清单:
| 产品编号 | 产品名称 | 包装 |
| P5082-0.5mg | Recombinant Traptavidin (2mg/ml) | 250μl |
| P5082-2mg | Recombinant Traptavidin (2mg/ml) | 1ml |
| P5082-10mg | Recombinant Traptavidin (2mg/ml) | 5ml |
| P5082-50mg | Recombinant Traptavidin (2mg/ml) | 25ml |
| — | 说明书 | 1份 |
保存条件:
-20ºC保存,两年有效。
注意事项:
由于蛋白的每次冻融均会引起部分失活,首次使用时建议分装后-20ºC或更低温度冻存,以避免反复冻融。
本产品仅限于专业人员的科学研究用,不得用于临床诊断或治疗,不得用于食品或药品,不得存放于普通住宅内。
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