PROBLEM TO BE SOLVED: To provide a method for efficiently separating and extracting proteoglycan from cartilage tissues in the head part of fish caught in large quantities, in particular salmon and trout, which are fished in the north sea and their residues after processing are discarded, and to provide a method for obtaining a proteoglycan composition having very little malodor and applicable to wide-ranging uses.SOLUTION: The method for extracting proteoglycan comprises the following processes (A)-(E), and the proteoglycan composition is obtained by this method. In the process (A), frozen aquatic animal tissues are crushed and treated at specific temperature and pH after adding water. In the process (B), a solid-liquid mixture obtained by the process (A) is centrifuged to remove a lipid layer in the top and an aqueous layer in the middle level, and the sediment is collected. In the process (C), the sediment is dried and pulverized to powder. In the process (D), a specific solvent is added to the obtained dried powder for extracting and removing residual lipid. In the process (E), the solvent is removed. The proteoglycan composition obtained by this method has no malodor, so that it can be suitable for use in the field of foods in particular.COPYRIGHT: (C)2009,JPO&INPIT【課題】大量に漁獲される魚、特に北洋において漁獲、加工された後に残渣として廃棄されている鮭、鱒の頭部の軟骨組織から効率よく分離抽出精製する方法を提供すること、及び異臭がほとんどなく、幅広い用途を有するプロテオグリカン組成物を得る方法を提供すること。【解決手段】下記のA~E工程よりなるプロテオグリカン組成物の抽出方法及びこの方法により得られる。プロテオグリカン組成物A.凍結した水棲動物組織を破砕し、これに水を加え、特定温度とpHで処理する工程、B.Aの固液混合物を遠心分離し、最上部の脂質層と中間層の水層を取り除き、沈殿物を回収する工程、C.沈殿物を乾燥し、微粉末化する工程、D.得られた乾燥微粉末に、特定溶媒を加え、残存脂質を抽出除去する工程、E.溶媒を除去する工程。本発明の方法により得られるプロテオグリカン組成物は、異臭がないために、特に食品分野での使用に適している。【選択図】なし
