Abstract

Abstract Ribonucleic acid preparations isolated from the mitochondria and cytosol of rat liver were acylated with l-phenylalanine with the aid of mitochondrial and cytosol extracts. The extent of acylation of the mitochondrial RNA is greater in the presence of a mitochondrial extract. Conversely, the cytosol RNA preparations are acylated more extensively by a cytosol extract. The phenylalanyl transfer RNA synthesized from mitochondrial RNA by the mitochondrial extract is chromatographically separable from the phenylalanyl transfer RNA formed from cytosol RNA in the presence of cytosol extracts.

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