Abstract: [Problem] Provided are a production method for a multi-input/multi-output-type genetic switch or a transcription factor, and a multi-input/multi-output-type genetic switch or a transcription factor. [Solving Means] The inventors of the present invention have completed a production method for a multi-input/multi-output-type genetic switch or a transcription factor, essentially including the steps of “fusing two or more transcription factor genes to each other” and “introducing mutations into the fusion-type transcription factor gene,” and have further succeeded in obtaining a multi-input/multi-output-type genetic switch or a transcription factor by the method.

Abstract: [Problem] Provided are a production method for a multi-input/multi-output-type genetic switch or a transcription factor, and a multi-input/multi-output-type genetic switch or a transcription factor. [Solving Means] The inventors of the present invention have completed a production method for a multi-input/multi-output-type genetic switch or a transcription factor, essentially including the steps of “fusing two or more transcription factor genes to each other” and “introducing mutations into the fusion-type transcription factor gene,” and have further succeeded in obtaining a multi-input/multi-output-type genetic switch or a transcription factor by the method.

Abstract: The present invention provides a method of producing a carotenoid having 50 carbon atoms which comprises culturing, in a medium, a cell transformed with a mutant phytoene desaturase gene and obtaining the carotenoid having 50 carbon atoms from the culture. The mutant phytoene desaturase gene has an introduced mutation to encode a mutant phytoene desaturase having an enhanced activity to desaturate a carotenoid backbone compound of 50 carbon atoms.

Abstract: The present invention provides a method of producing a carotenoid having 50 carbon atoms which comprises culturing, in a medium, a cell transformed with a mutant phytoene desaturase gene and obtaining the carotenoid having 50 carbon atoms from the culture. The mutant phytoene desaturase gene has an introduced mutation to encode a mutant phytoene desaturase having an enhanced activity to desaturate a carotenoid backbone compound of 50 carbon atoms.

Abstract: The present invention provides a method of producing a carotenoid having 50 carbon atoms which comprises culturing, in a medium, a cell transformed with a mutant phytoene desaturase gene and obtaining the carotenoid having 50 carbon atoms from the culture. The mutant phytoene desaturase gene has an introduced mutation to encode a mutant phytoene desaturase having an enhanced activity to desaturate a carotenoid backbone compound of 50 carbon atoms.

Abstract: Provided are: a selection method for a gene switch and a gene circuit, including using, as a selector, an expression vector containing at least a gene sequence whose expression is controlled by a transcription regulatory factor to be expressed when a genetic switch and a genetic circuit including the genetic switch operate, and a promoter sequence operably linked to the gene sequence upstream thereof; and an expression vector to be used in the selection method. This enables an effective selection method for a genetic switch and a genetic circuit, the selection method being able to be conducted within a short time period and with high selection efficiency and less leakiness.

Abstract: The present invention provides a method of producing a carotenoid having 50 carbon atoms which comprises culturing, in a medium, a cell transformed with a mutant phytoene desaturase gene and obtaining the carotenoid having 50 carbon atoms from the culture. The mutant phytoene desaturase gene has an introduced mutation to encode a mutant phytoene desaturase having an enhanced activity to desaturate a carotenoid backbone compound of 50 carbon atoms.

Abstract: Provided are: a selection method for a gene switch and a gene circuit, including using, as a selector, an expression vector containing at least a gene sequence whose expression is controlled by a transcription regulatory factor to be expressed when a genetic switch and a genetic circuit including the genetic switch operate, and a promoter sequence operably linked to the gene sequence upstream thereof; and an expression vector to be used in the selection method. This enables an effective selection method for a genetic switch and a genetic circuit, the selection method being able to be conducted within a short time period and with high selection efficiency and less leakiness.

Abstract: A stereoscopic image projector has a light valve controlled by two image signals. The light valve produces a polarized raster image in which some rasters are modulated by the first image signal and other rasters by the second image signal. A polarization switch changes the polarization of rasters modulated by the second image signal, thereby creating a stereoscopic image, which is projected through a projection lens onto a screen, and viewed through polarizing eyeglasses. A color stereoscopic image is obtained by using three light valves and three polarization switches, one for each of the three primary colors, and combining their images for projection through a single projection lens. The projection lens is preferably a telecentric zoom lens consisting of three lens groups.

Abstract: A retrofocus projection lens system comprising, in order from a large conjugate side a first lens group having a negative refracting power and including a plurality of lenses, a second lens group having a positive refracting power, and a third lens group having a positive refracting power and including a plurality of lenses. The lens of the first lens group which is nearest to the large conjugate side is an aspherical lens, and the lens of the third lens group which is nearest to a small conjugate side is an aspherical lens. The retrofocus projection lens system desirable satisfy the following conditional expressions (1) to (3):1.8<D.sub.1 /f<3.0 (1)1.1<f.sub.2 /f.sub.3 <1.6 (2)1.5<.vertline.f.sub.1 .vertline./f<2.3 (3)where a symbol f.sub.1 designates a focal length of the first lens group, a symbol f.sub.2 designates a focal length of the second lens group, a symbol f.sub.