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The mechanism of activation of metastasis-associated mts1 gene transcription in the mouse myelomonocytic leukaemia WEHI-3 cell line is described. Northern blot analysis showed that WEHI-3 cells expressed two types of mts1-specific mRNA: standard (550 nt) and additional (about 800 nt). The steady-state expression level of the 800-nt mRNA was 10-fold higher than that of the 550-nt mRNA. A cDNA clone...
In the ets gene family of transcription factors, elk1 belongs to the subfamily of Ternary Complex Factors (TCFs) which bind to the Serum Response Element (SRE) in conjunction with a dimer of Serum Response Factors (SRFs). In this communication we report the isolation of cDNAs from the mouse elk1 gene, containing the full coding sequence homologous (87% identical) to the human gene, and the structure...
Removal of introns from pre-messenger RNA (pre-mRNA) requires small nuclear RNAs (snRNAs) packaged into stable small ribonucleoprotein particles (snRNP). These snRNPs contain specific and common proteins also called Sm proteins. Correct assembly of the snRNAs with the common proteins is an essential step for the biogenesis of snRNP particles. We have identified a new Saccharomyces serevisiae gene,...
Among the small nuclear RNAs (snRNAs) involved in the spliceosomal processing of pre-mRNA, U6 is the most conserved. As a first evidence for the presence of the splicing machinery in the amitochondrial protozoan Entamoeba histolytica (Eh), we have cloned the u6 snRNA gene. We find that in this organism u6 is a single copy gene that is transcribed as a poly(A) - RNA molecule of approximately...
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