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  • Title: Regulatory sequences required for hst-1 expression in embryonal carcinoma cells.
    Author: Koda T, Hasan S, Sasaki A, Arimura Y, Kakinuma M.
    Journal: FEBS Lett; 1994 Mar 28; 342(1):71-5. PubMed ID: 8143853.
    Abstract:
    The hst-1 gene, which is implicated in mammalian embryonic development and morphological transformation of NIH3T3 cells, is expressed in undifferentiated F9 cells, but not in differentiated F9 and other well-differentiated cells, such as PYS-2, NIH3T3 and HeLa cells. An octamer element present in the 3' untranslated region acts as an enhancer. Although Oct3 is down-regulated when F9 cells are differentiated, transient expression of Oct3 did not enhance the hst-1 promoter activity in HeLa, NIH3T3 or PYS-2 cells. Thus, the role of Oct3 on hst-1 expression remains elusive, and an additional transcription factor which interacts may regulate hst-1 transcription in association with Oct1, Oct3 or both.
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