In six different angiosperms, mitochondrial genes for 18S and 5S rRNAs were found to be closely linked but distant from mitochondrial 26S rRNA genes.

Mouse L-cells contain RNA capable of hybridizing with mouse satellite DNA on nitrocellulose membranes and of competing for hybridizing sites on satellite DNA with transcript of satellite DNA prepared in vitro. RNA prepared from either whole cells or from the cytoplasm includes a fraction hybridizing with satellite DNA. That from whole cells has a half-life of 17 min, whereas that from cytoplasm is stable.

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