Filature manner of the imported gene revelation kaiko cocoon and the product by that

摘要

A cocoon is dried under low temperature (60°C or lower) conditions, rather than the conditions where the temperature is higher than 100°C which has been employed conventionally for the production of a raw silk from a cocoon.  Further, the boiling of a cocoon is carried out by employing a vacuum infiltration treatment at a low temperature (a subatmospheric pressure treatment), rather than a high-temperature treatment at 100°C or higher or a treatment with hot water having a temperature around the boiling point which has been employed conventionally.  As an alternate cocoon boiling method, a combination of the swelling of sericin with an alkali and the penetration of hot water into a cocoon layer by using a surfactant, an enzyme or the like is carried out.  The silk reeling is carried out at a lower temperature than that has been employed conventionally. As a result, it is found that a raw silk can be produced from a cocoon of a silkworm that expresses a foreign gene without deteriorating the properties of a foreign protein contained in the cocoon of the silkworm.