Abstract
A regulatory element consisting of a MAR element sequence of Drosophila heat shock genes and enhancer from a long terminal repeat of the mouse mammary tumor virus is created for studying the possibility of increasing the expression level of hybrid genes in transgenic animals. Two lines of transgenic mice containing the described regulatory element and hybrid gene intended for expressing human beta interferon in milk of transgenic animals are obtained by the method of coinjection into the pronuclei of murine zygotes. It is shown that the use of the given regulatory element doesn’t lead to an increase of activity of human beta interferon in milk compared with transgenic rabbits containing only the hybrid gene for expressing beta interferon. Furthermore, a decrease of tissue-specific expression of beta interferon is observed with the use of the regulatory element.
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