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瑞士DUALsystems BioTech
DUALsystems BioTech公司成立于2000年，是從瑞士蘇黎世大學獨立出來具有自主產權的生物公司。DUALsystems公司一心致力于蛋白組學領域產品的研發，包括通過酵母系統進行蛋白質間相互作用研究的產品和服務，cDNA文庫構建試劑和服務，在酵母中或E. Coli中進行重組蛋白的制備和純化，以及一系列相關的試劑和抗體。
DUALsystems公司作為蛋白組學領域的最主要供應商，已有多年的蛋白組學領域的經驗，并不斷開闊創新，因此可以提供高質量和獨特的產品，也可以提供一流的定制服務。
? 蛋白質間相互作用篩選系統
- DUALhybrid系統——核蛋白的酵母雙雜交系統
- DUALmembrane系統——膜蛋白的酵母雙雜交系統
- DUALhunter系統 (new)——膜相關蛋白、核蛋白和自我激活蛋白的酵母雙雜交系統
? 蛋白表達與純化系統
- DUALXPress 蛋白表達系統 (new) ——E Coli.系統
- KickStart蛋白表達系統——酵母系統
? cDNA library構建系統
? 酵母工具
? 其他：抗體和試劑
DUALhybrid篩選技術是基于最初的酵母雙雜交系統，在篩選新的蛋白質間相互作用方面，進行多方面的優化，如速度、特異性和成本。
DUALmembrane系統是DUALsystems公司最獨特的具有自主專利的產品系列。它擺脫了傳統酵母雙雜交的最大局限性（即只能檢測核蛋白之間的相互作用），成為檢測或篩選跨膜蛋白間相互作用強有力的檢測技術。它利用分離的泛素系統（split-ubiquitin）直接檢測天然狀態下膜蛋白間的相互作用，是目前市面上唯一可提供檢測膜蛋白間相互作用的新新基因系統。
Dualsystems Biotech was founded in 2000 as a spin-off company from the Institute of Veterinary Biochemistry and Molecular Biology of the University of Zurich.

Dualsystems is a leading provider of custom services and products in the emerging field of proteomics:

Solutions for protein interaction discovery
Custom screening services for protein interactions discovery
Solutions for protein expression and purification
Solutions for cDNA library construction
Our experience in functional proteomics enables us to provide you with services of unsurpassed quality and consistency.

Dualsystems Biotech AG is a biotech spin-off company founded in 2000. Our major focus is the development of products and services in the emerging area of proteomics. Our areas of expertise include screening for protein-protein interactions using yeast based systems, expression and purification of recombinant proteins in yeast and E. coli, solutions for cDNA library construction and a range of specialized reagents and antibodies.

The DUALhybrid screening technology is based on the original yeast two-hybrid system and offers several advantages when searching for novel protein-protein interactions, such as speed, specificity and low cost.

The DUALmembrane system is an extremely powerful screening technology aimed at identifying protein-protein interactions between integral membrane proteins. By circumventing problems associated with traditional screening systems, the DUALmembrane system is used to directly identify interactions between membrane proteins in their natural setting.

The DUALXPress technology is a novel, innovative system to express recombinant proteins in E. coli at very high levels and with a high degree of solubility. The dualTRAP resin is an excellent choice for single-step protein purification because it has a very low non-specific binding capacity.

The EasyClone cDNA library construction kits are suited for quick and easy construction of highly complex cDNA libraries with a high representation of 5' ends.