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The leucine amber suppressor tRNA of an Escherichia coli strain carrying the Su6+ gene has been purified completely by benzoylated DEAE-cellulose chromatography. This tRNA mediates in vitro polyleucine formation with poly r(U-A-G). In the aminoacylation reaction with the pure Escherichia coli leucyl-tRNA synthetase it possesses the same Km (5 x 10-8 m) as the other tRNAleu species.
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Hayashi et al. (1971) studied this question.
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