METHOD FOR PRODUCING RAW SILK FROM EXTRANEOUS-GENE-EXPRESSED BOMBYX MORI COCOON, AND PRODUCT USING THE RAW SILK

摘要

PROBLEM TO BE SOLVED: To provide a method for producing raw silk from the cocoons of Bombyx mori with an expressed extraneous gene without impairing the properties of extraneous protein(s) therein.

SOLUTION: The method includes the following process: Cocoons are dried at a relatively low temperature of 60°C rather than dried at a 100°C or higher condition as is the case with normal production of raw silk from cocoons. Also, in boiling the cocoons, they are put to low-temperature and vacuum infiltration treatment (reduced-pressure treatment) rather than a conventional high-temperature treatment at 100°C or higher or a high-temperature treatment at near the boiling point. Also, as a cocoon-boiling method differing from the above, the cocoons are put to a combinational treatment of sericin swelling by alkali and hot-water infiltration into the cocoon layer by a surfactant, an enzyme or the like. Further, a silk reeling is conducted at a temperature lower than those in conventional cases. As a result, it has been found that the cocoons of Bombyx mori with an expressed extraneous gene can be made into raw silk without impairing the properties of extraneous protein(s) therein.

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