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    •                                                    Zhang et al., 2014, Food Chemistry


      Because a large amount of collagen can be obtained from the skin and swim bladder their industrialization is possible.

      Type II collagen can be obtained from the notochord. Type II collagen is contained in special tissues, such as the cartilage, and is a valuable collagen with a small amount distributed on the market. The notochord is a tissue unique to the ancient fish Acipenseridae, which normally degenerates in other animals.