Abstract
To examine the role of human beta-globin enhancers in tissue-specific and developmental regulation, a hybrid beta-globin-simian virus 40 gene was analyzed in transgenic mice. A beta-globin DNA fragment containing two previously defined enhancers stimulated transcription from the simian virus 40 promoter in a tissue- and stage-specific pattern similar to that of the normal beta-globin gene. These results help to define the functions of beta-globin regulatory elements and suggest an approach for targeted expression of heterologous genes in erythroid cells in vivo.
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