The extraction of collagen protein from pigskin

As the collagen protein market increasingly grows, it becomes a priority to explore a economic, stable , and environmentally-friendly extraction method to reali ze the high-value transformation of pigskin. In thi s paper, the structure of collagen protein is introduced first. Then five methods, which extract collagen protein f rom pigskin or a kind of leather industry waste-chrome shavings, are reviewed. These methods include the salting out me thod, alkali method, acid method, enzyme method and hybrid metho d. They are contrasted in several ways, and thus pr ovide evidence for better extracting collagen protein.