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MSH: RNA molecules which hybridize to complementary sequences in either RNA or DNA altering the function of the latter. Endogenous antisense RNAs function as regulators of gene expression by a variety of mechanisms. Synthetic antisense RNAs are used to effect the functioning of specific genes for investigative or therapeutic purposes.,NCI: Small pieces of RNA that can bind to specific molecules of RNA and block the cell's ability to use the RNA to make a protein or work in other ways. Antisense RNA may be used to block the production of proteins needed for cell growth. It is being studied in the treatment of many types of cancer.
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