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In crude enzymes extracted from the Lunella cornata coreensis there are two algi- nases with different functions. One of the alginases can cleave the middle bond of the algin molecular chains in the reactive condition of 30 μM pH 7.5 Tris-HCl buffer and 50 μM KCl per ml of reactive mixture Ⅰ. This enzyme can readily decrease the viscosity, but the reducing groups increase slowly in the algin reactive mixture Ⅰ. Thus, it is defined as alginase Ⅰ.
One of the alginases can cleave the middle bond of the algin molecular chains in the reactive condition of 30 μM pH 7.5 Tris-HCl buffer and 50 μM KCl per ml of reactive mixture Ⅰ. This enzyme can vary decrease the viscosity, but the reducing groups increase slowly in the algin reactive mixture Ⅰ.