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The research aims to explore the activation of the adenovirus EIIa promoter in the absence of E1A protein during mouse development.

December 1, 1989Development

Transactivation of the adenovirus Ella promoter in the absence of adenovirus E1A protein is restricted to mouse oocytes and preimplantation embryos

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The research aims to explore the activation of the adenovirus EIIa promoter in the absence of E1A protein during mouse development.
Injected mouse oocytes and preimplantation embryos with plasmids containing the EIIa promoter and reporter genes.
Assessed activity of EIIa promoter relative to human 293 cells and differentiated fibroblasts.
Monitored expression in post-implantation transgenic embryos.
EIIa promoter activity was observed in mouse oocytes and preimplantation embryos, surpassing activity of HSV thymidine kinase promoter.
Coinjection of E1A did not enhance EIIa activity further due to high c-myc protein levels in oocytes.
EIIa promoter activity was exclusive to undifferentiated stages, with expression noted only in adult ovarian oocytes.

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Randomized trial reveals EIIa promoter activity in mouse oocytes and preimplantation embryos, suggesting key roles in early development.

Dooley et al. (1989) studied this question.

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