RESEARCH ARTICLES Evolutionary History of 4.5SH RNA


4.5SH RNA is a 94-nt small RNAwith unknown function. This RNA is known to be present in the mouse, rat, and hamster cells; however, it is not found in human, rabbit, and chicken. In the mouse genome, the 4.5SH RNA gene is a part of a long (4.2 kb) tandem repeat (;800 copies) unit. Here, we found that 4.5SH RNA genes are present only in rodents of six… (More)


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