NR-4477蓖麻,蓖麻毒素,与N末端组氨酸标签重组(毒素)
产品图片
货号/SKU
NR-4477
货号/规格
EA
库存与交货期
3-8周
人民币价格
14000
试剂海关审批
A/B级风险物质只能直接使用人购买并持有实验室有效资质,其它询客服确认
国外采购
支持/部分限制一年内购买数量
厂牌
BEI Resources(ATCC)
产品基础信息
生物安全等级建议分类:美国、1
产品描述信息
NR-4477??Ricinus communis, Ricin Toxoid, Recombinant with N-Terminal Histidine Tag(Toxins)|Ricinus communis|Ricin Toxoid, Recombinant with N-Terminal Histidine Tag|-20°C or colder (Note: For long term storage, store at -80°C or colder.)|AD O'Brien, JF SinclairAcknowledgment for publications should read "The following reagent was obtained through BEI Resources, NIAID, NIH: Ricin Toxoid, Recombinant with N-Terminal Histidine Tag, NR-4477."|Quantity limit per order for this item is 1. This item can be ordered twice a year. Orders over this limit will be sent to NIAID for approval before shipment.
Ricin toxin is a glycoprotein that can be isolated from the seeds of the castor bean plant Ricinus communis (R. communis). Structurally, ricin toxin consists of two polypeptide chains, A and B, that are linked by a disulfide bond. The A chain of ricin toxin catalytically inactivates the eukaryotic 28S ribosomal RNA subunit resulting in the inhibition of protein synthesis and death of the cell. The ricin toxin B chain is a galactose-specific lectin that mediates the binding and delivery of the toxin to target cells. The sequence of the R. communis gene for the ricin toxin precursor protein has been reported (GenBank: X03179).
NR-4477 is a genetically inactivated ricin toxoid expressed in Escherichia coli and purified by metal affinity chromatography. Catalytic Glu and Arg residues in the toxin active site have been mutagenized to create a non-toxic protein. The protein is expressed recombinantly as a single 62 kDa polypeptide containing both the A and B subunits. It also has an additional amino-terminal histidine-tag sequence.
NR-4477 reacts specifically with monoclonal antibodies to ricin A chain (BEI Resources NR-843) as determined by western blot analysis.
Each vial of NR-4477 contains approximately 500 ?g of ricin toxoid suspended in PBS, pH 8.4.
Ricin toxin is a glycoprotein that can be isolated from the seeds of the castor bean plant Ricinus communis (R. communis). Structurally, ricin toxin consists of two polypeptide chains, A and B, that are linked by a disulfide bond. The A chain of ricin toxin catalytically inactivates the eukaryotic 28S ribosomal RNA subunit resulting in the inhibition of protein synthesis and death of the cell. The ricin toxin B chain is a galactose-specific lectin that mediates the binding and delivery of the toxin to target cells. The sequence of the R. communis gene for the ricin toxin precursor protein has been reported (GenBank: X03179).
NR-4477 is a genetically inactivated ricin toxoid expressed in Escherichia coli and purified by metal affinity chromatography. Catalytic Glu and Arg residues in the toxin active site have been mutagenized to create a non-toxic protein. The protein is expressed recombinantly as a single 62 kDa polypeptide containing both the A and B subunits. It also has an additional amino-terminal histidine-tag sequence.
NR-4477 reacts specifically with monoclonal antibodies to ricin A chain (BEI Resources NR-843) as determined by western blot analysis.
Each vial of NR-4477 contains approximately 500 ?g of ricin toxoid suspended in PBS, pH 8.4.
主要内容
此项目的每个订单数量限制为1.此商品每年可订购两次.此限制的订单将在发货前发送到核苷酸以进行批准. 蓖麻毒素是一种糖蛋白,可以从蓖麻植物的种子中分离出来 ricinus communis ( r.communis ).在结构上,蓖麻毒素由两种多肽链,A和B组成,其通过二硫键连接.蓖麻毒素的链条催化灭活真核28s核糖体RNA亚基,导致抑制细胞的蛋白质合成和死亡.蓖麻毒素毒素B链是半乳糖特异性凝集素,介导毒素的毒素与靶细胞的结合和递送. r的序列.报告了蓖麻毒素前体蛋白的Communis (Genbank:X03179). NR-4477是在大肠杆菌中表达的基因灭活的蓖麻毒素,并纯化金属亲和层析.毒素活性位点中的催化性glu和Arg残留物已被诱变以产生无毒蛋白质.作为含有A和B亚基的单个62kDa多肽,重组表达蛋白质.它还具有额外的氨基 - 末端组氨酸标签序列. NR-4477特别用单克隆抗体对蓖麻斑(BEI资源NR-843)进行反应,如Western印迹分析所确定的. 每个小瓶NR-4477含有约500μg悬浮在PBS中的蓖麻毒素,pH 8.4.
厂牌介绍
BEI Resources 由美国国家过敏和传染病研究所 ( NIAID )成立,旨在为研究 A、B 和 C 类优先病原体、新兴传染病病原体、非病原微生物和其他相关微生物材料提供试剂、工具和信息到研究界。BEI Resources 获取、验证和生产科学家进行基础研究和开发改进的诊断测试、疫苗和疗法所需的试剂。通过将这些功能集中在 BEI Resources 中,可以监控科学界对这些材料的访问和使用,并确保试剂的质量控制。
除了为传染病界提供材料外,BEI Resources 还鼓励和支持研究人员和机构的材料存放。使用 BEI Resources存放材料对研究人员和研究社区有许多优势,包括安全存储、社区访问和分发;同时保护存款人的知识产权。只要有需要,BEI 资源库将作为研究人员的资源进行维护。您在 BEI Resources 的存款是一项有助于未来研究的长期投资。
BEI Resources 自 2003 年起由美国典型培养物保藏中心 (ATCC) 根据合同管理。2016 年 5 月, ATCC获得了一份为期七年的继续管理 BEI Resources的合同。合同范围已扩大到更全面的研究目录材料,包括由其他政府支持的研究项目存放的材料,将提供给生物防御和新兴传染病科学界。真菌、寄生虫、载体和其他相关材料已添加到现有的细菌、病毒和毒素试剂中,涵盖 NIAID A、B 和 C 类优先病原体和 NIAID 指定的新发传染病病原体和生物。
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