Expression System 2 is a versatile tool used in molecular biology for the production of proteins. It allows researchers to express genes in a controlled environment, facilitating the study of protein function and structure. This system is particularly useful for producing proteins that are difficult to express in other systems. The system typically utilizes yeast or bacterial cells, which can be genetically modified to enhance protein yield and quality. By using Expression System 2, scientists can efficiently produce large quantities of proteins for various applications, including drug development and vaccine production.