期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1984
卷号：81
期号：23
页码：7392-7396
DOI：10.1073/pnas.81.23.7392
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：We present evidence that two distinct regions of the DNA upstream from the mouse metallothionein-I gene contain metal-responsive regulatory sites. This result was obtained by analyzing a systematic series of deletion, insertion, duplication, and clustered point mutations introduced into cultured cells on a simian virus 40 plasmid vector. The two upstream regions contain a duplicated evolutionarily conserved DNA sequence. While either upstream region is sufficient to confer heavy metal responsiveness, both are required to give maximal levels of induced transcription.
