Hitachi Zosen Corporation

Yoshihisa Nakazawa

Akio Kobayashi

Takeshi Bamba

Eiichiro Fukusaki

Kazumasa Hirata

Koichiro Gyokusen

Yoko Harada

Hirotaka Uefuji

Ren Chen

Yoko Nakadozono

Shuntaro Maeta

Tuyoshi Takeda

A method for increasing the amount of trans-1,4-polyisoprene contained in a plant, and a method for effectively producing trans-1,4-polyisoprene using a plant are provided. A long-chain trans-prenyl diphosphate synthase gene that comprises DNA having at least one base sequence selected from the group consisting of a base sequence from positions 88 to 1134 of the base sequence of SEQ ID NO: 1 or a complementary sequence thereof, a base sequence from positions 42 to 1088 of the base sequence of SEQ ID NO: 3 or a complementary sequence thereof, and a base sequence from positions 91 to 1140 of the base sequence of SEQ ID NO: 5 or a complementary sequence thereof are disclosed; as well as a plant transformed with an expression vector containing the gene.

Long-chain trans-prenyl diphosphate synthase gene

Provided is an eucommia-derived biopolymer, which is obtained by biologically decaying an eucommia to obtain an eucommia decomposition product, and washing the eucommia decomposition product. The biopolymer is obtained by such a convenient method, and contains mainly a trans-isoprenoid and has a relatively high molecular weight. Therefore, the biopolymer is solid and elastomeric, and is useful as an industrial material.

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Osaka, Japan

Yoshihisa Nakazawa