MUCOUS SUBSTANCE ORIGINATING FROM SANDFISH OVARY, ITS ACQUISITION METHOD AND USE

摘要

PROBLEM TO BE SOLVED: To develop a method for separating spawn from mucous substances of sandfish ovaries and to establish an effective utilization method of the viscous substances and the spawn.

SOLUTION: The mucous substances originating from the sandfish ovaries have properties below: (1) They have a molecular weight of 43 kDa (by the SDS-polyacrylamide electrophoretic method). (2) They have an N-terminal amino acid sequence represented by sequence number 1 in the sequence table. (3) They have a viscosity of 24 mPa s (concentration: 0.8 w/v%, 1% SDS solution; shear rate of 49.5 [s-1]; temperature of 25°C). (4) They have thermal stability such that the viscosity (Pa s) is retained at the level of 71% when heated at 100°C for 40 min. (5) They have an isoelectric point of 5.2. The method for separating the spawn from the mucous substances comprises subjecting the sandfish ovaries to a water treatment or to cutting of ovary cores. Uses of the viscous substances and the spawn are also provided.

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