Enzymatic modification of starch–protein raw material by lipases

Cell refining can use renewable biomass resources as raw materials and decompose biomass through complex microbial metabolic networks and regulatory networks to synthesize a series of products to replace fossil energy and chemical products. The efficient and directed production of target compounds by microbial cells during a biorefinery requires the interference and changing of the original microbial control system. In essence, the core of cell refining is strains selection, which includes the creation of a new metabolic pathway, which enables the construction of the metabolic network model, and allows the design of new products by altering or reducing the metabolic pathways. Therefore, on the basis of the regulatory mechanism of microbial metabolism, achieving both a high production yield and a high production intensity of target metabolites by directed changing and optimization of physiological function of microbial cells have a significant effect on the biomass conversion technologies using cell refining as the core content.