<p> <br /> </p> <p> The preparation, purification and identification of protein is the basis of all protein scientific research. The Protein Preparation and Identification facility at Technology Center for Protein Science, Tsinghua University have the scale effect since foundation, which can give full support to the research on protein structure and function. We provide four kinds of expression systems such as: E. Coli, Yeast, Insect cell and Mammalian cell suspended system to researchers from universities, research institutes, small biological companies and so on. We can also provide the protein related services, including molecular cloning, expression and purification, characterization and the analysis of interaction and a series of related research. </p> <p> <br /> </p> <p> http://phoenix.tsinghua.edu.cn/platform?group=18 </p>