Dendritics公司主要关注人类树突状细胞，希望找到能够促使CD34+造血前体细胞转化为树突状细胞（在GM-CSF和TNF-alpha存在的情况下）的细胞因子。在1992-2005年间，大量的研究使得研究者对人类树突状细胞的产生、细胞通路、C-type凝集素受体的功能及Toll-like受体的活性有了更深的理解。

DENDRITICS was started in 2005 by former members of SCHERING PLOUGH Laboratory for Immunological Research (LIR) in Dardilly, France. From their long experience at LIR, the team members of DENDRITICS have gathered complementary scientific and technological knowledge in different areas of immunology. The initial focus of LIR was in the biology of B lymphocytes, elaboration of human monoclonal antibodies, and in cytokine discovery (IL-3, IL-4, IL-7, IL-10, IL-17, GM-CSF) together with our colleagues of DNAX Research Institute in Palo Alto, California.

Our interest in cytokines led to the finding that human dendritic cells (DCs) could be generated in vitro from CD34+ hematopoietic progenitors cultured in the presence of GM-CSF and TNF-alpha.

The period from 1992 to 2005 saw the specialization of LIR in DC biology and was fuelled by a large-scale effort to discover and study the function of genes specifically expressed by these cells. This program led to a number of findings that contributed in particular to understanding the heterogeneity of DCs, the pathways regulating DC migration, the function of C-type lectin receptors in DCs and the activity of Toll-like receptors in DCs. Many novel genes were discovered through screening of cDNA libraries or through monoclonal antibodies raised against DCs.

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艾美捷科技代理DNA Polymerase Technology品牌全系列产品

DNA Polymerase Technology的核心领域是PCR（聚合酶链式反应），致力于通过先进的转基因酶和其他PCR产品，克服多个领域中的常见障碍，包括临床诊断、法医分析、食品安全、环境中病原体检测以及一般分子生物学研究。Klentaq公司发明的新型酶进一步提升了PCR性能，具有以下特点：扩增更长的目标片段，具有更高的保真度，反应速度更快，并且能够耐受血液或土壤等抑制性污染物。该公司产品线包括：Klentaq产品、OmniTaq产品、ZipTaq产品、 Long &Accurate 的产品、热启动产品、热启动LA产品、Lyoph-Ready产品、PCR增强剂和缓冲液、PCR试剂盒以及组合产品。此外，公司开发的其他技术还包括：PCR增强剂组合以及热启动缓冲液。

▍DNA Polymerase Technology公司产品线

● Klentaq 产品：5-核酸外切酶缺陷型 Taq 聚合酶可提供更高的保真度和热稳定性，特别是作为 LA(长准确)酶混合物的一部分。Klentag1是 Jag DNA 聚合酶的 Klenow 片段类似物。它是已知最耐热的 Tag 形式，完全不具备核酸外切酶或内切酶活性，并且其晶体结构已被解析清楚。该酶的 LA版本是 Klentag1 和校对酶的混合物。

● OmniTag 产品：Klentaq的抗抑制DNA聚合酶经过特殊筛选，对多种常见的高效PCR抑制剂（例如：全血、血清、血浆、尿液、腐殖酸、胆盐、植物组织提取物、各类食品相关抑制剂、GITC（异硫氰酸胍）、乙醇等）具有极强的耐受性。因此，这些酶能在大多数市售Taq产品完全失效的抑制剂浓度下，依然进行有效的PCR扩增。Taq突变体的这一独特优势使得对多种临床样本、环境样本和法医样本进行免提取直接PCR成为可能，跳过了耗时的DNA提取步骤。

● ZipTaq产品

●  Long &Accurate 产品：使用 DNA 聚合酶和校对酶的专利组合，具有更高的保真度，是扩增长片段DNA目标序列的理想选择，此外，它们通常具备更强的稳健性，因此扩增短片段目标序列时同样适用。

●  Klentaq的热启动技术包含：

①铯酶：它们是Taq或 Klentaq1 DNA聚合酶的双重冷敏感突变体，由于在低温下活性受到抑制，它们能为PCR提供自动热启动

②适配体抑制技术：适用于所有酶，在低于循环温度时，该适配体形成发夹结构并结合到聚合酶的活性位点，从而使酶失活并防止错误扩增

③LA产品：具有更高的保真度以及更强的稳健性

●  Lyoph-Ready 产品

●  PCR相关产品

①PCR增强剂和缓冲液产品：PEC 产品是非甜菜碱基 PCR 增强剂，专门设计用于抑制性模板。强烈建议将它们与我们的抑制抗性 Taq 和Klentag 突变体一起使用。它们还与大多数市售 DNA 聚合酶兼容。

②PCR 试剂盒产品:试剂盒包括 DNA 聚合酶、缓冲液和 dNTP，有标准套件和长而精确(LA) 套件。

③组合产品：测试多种酶和 PCR 增强剂混合物以优化 PCR 的一种经济高效的方法。

Chem Service公司成立于1962年，专注于制造高品质、高纯度的标准物质。

Established in 1962, Chem Service is accredited to ISO Guide 34:2009, ISO/IEC 17025:2005, and registered and certified to the ISO 9001:2008 Quality Management System for the design, development, production, distribution, and servicing of organic neat and synthetic reference materials.

Chem Service, Inc. produces high purity standards for use as reference materials and for other laboratory purposes. More than 95% of our Standards Grade materials have a certified purity of 98.0% or greater and do not require purity corrections when preparing solutions for use with EPA, USTM, UST, and numerous other international methods. You can trust that our high purity standards are a quality product.

Standards Grade chemicals are clearly labeled with an expiration date that is based on years of experience in handling and testing. Products are packaged in small quantities to minimize storage, waste, and disposal requirements. Organic and inorganic chemicals, solutions, and mixtures are available to meet a wide range of specialized laboratory needs.