Positive and negative regulation of a transfected chimeric tyrosine aminotransferase gene: effect of copy number.


To define a selective system for the study of rat tyrosine aminotransferase (TAT; EC gene expression, we have introduced into cultured cells the selectable bacterial gene gpt linked to TAT gene flanking sequences. After integration in host cell DNA, the chimeric gene exhibits the same pattern of regulation as the TAT gene. In hepatoma cells, its… (More)


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