Preparation and Separation of protein Specimens: Finding a better method to extract all protein from cells or tissues as completely as possible is an important prerequisite for comparative protein omics research. Comparative analysis of protein images: The gel atlas obtained by two-dimensional electrophoresis can be analyzed and compared by image analysis software. Identification of differential protein peptides: Mismatch points and abnormal match points displayed by image analysis are the interests of comparative protein genomics. Search and analysis of single-row database: The protein database is an attribute database, and the properties of protein can be analyzed and determined by searching the protein database. If you can't find it, it may be a new protein.