Untranslated RNA

UNTRANSLATED RNA - See NONTRANSLATED RNA.
UPSTREAM - Identifies sequences located in a direction opposite to that of expression; for example, the bacterial promoter is upstream of the initiation codon.
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Untranslated RNA: See Nontranslated RNA.
Upstream activator sequence: A binding site for transcription factors, generally part of a promoter region.
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(Rougeulle et al., 2003) The centre contains twelve genes, seven of which code for proteins, five for untranslated RNAs, of which only two are known to play an active role in the X inactivation process, Xist and Tsix.
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The centre contains twelve genes, seven of which code for proteins, five for untranslated RNAs, of which only two are known to play an active role in the X inactivation process, Xist and Tsix.
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