Recombinant plasmids comprising (a) a ubiquitous promoter, (b) one fluorescent gene, the gene being operably liked to and inserted downstream of the ubiquitous promoter, (c) a skin-specific or muscle-specific promoter, and (d) another fluorescent gene, the gene being operably linked to and inserted downstream the skin-specific or muscle specific promoter. The ubiquitous promoter and the skin-specific or muscle promoter have the adverse directional property and the ubiquitous promoter and the skin-specific or muscle-specific promoter are located upstream of the fluorescent gene and the another fluorescent gene respectively so as to have the directional property which permits transcription of the genes. Host cells, transgenic fish harboring the plasmid of the invention and methods of producing a transgenic fish can be made with the plasmids of the invention.

 
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> In vivo models for rabGEF1-dependent signaling and functions

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