Generally, the positive effects of KGM on SEP, Ca2+-ATPase activity, total sulphydryl and active sulphydryl contents of myofibrillar protein from grass carp were associated with the chemical
structure of KGM which is a water-soluble non-ionic polysaccharide with a large number of hydroxyl groups. During frozen storage of myofibrillar protein, active hydroxyl groups on D-glucose and Dmannose in KGM molecules of KGM molecules could reduce the formation of disulfide bonds, hydrogen bonds, and hydrophobic bonds so as to alleviate protein molecule aggregation and to prevent protein denaturation. In addition, KGM molecules had good water absorptivity because of lots of hydroxyl groups and could enhance the transformation of free water into bound water
amongst myofibrillar protein molecules to reduce the temperature of eutectic point and the ice crystal amount and to form incompletely frozen area, which might cause the decrease of protein molecule aggregation and the mitigation of protein denaturation during frozen storage.
Generally, the positive effects of KGM on SEP, Ca2+-ATPase activity, total sulphydryl and active sulphydryl contents of myofibrillar protein from grass carp were associated with the chemicalstructure of KGM which is a water-soluble non-ionic polysaccharide with a large number of hydroxyl groups. During frozen storage of myofibrillar protein, active hydroxyl groups on D-glucose and Dmannose in KGM molecules of KGM molecules could reduce the formation of disulfide bonds, hydrogen bonds, and hydrophobic bonds so as to alleviate protein molecule aggregation and to prevent protein denaturation. In addition, KGM molecules had good water absorptivity because of lots of hydroxyl groups and could enhance the transformation of free water into bound wateramongst myofibrillar protein molecules to reduce the temperature of eutectic point and the ice crystal amount and to form incompletely frozen area, which might cause the decrease of protein molecule aggregation and the mitigation of protein denaturation during frozen storage.
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