When the human epsilon- or beta- globin genes driven by the dominant control region ( DCR ) are introduced into this system , the human epsilon- globin gene , in contrast to the beta- globin gene , is not deregulated by the presence of the DCR and is expressed strictly as an embryonic gene .
when the human epsilon- or beta- globin genes driven by the dominant control region ( dcr ) are introduced into this system , the human epsilon- globin gene , in contrast to the beta- globin gene , is not deregulated by the presence of the dcr and is expressed strictly as an embryonic gene .
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