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The leucyl-tRNA synthetase activity from cotyledons of 4-day-old soybean seedlings has been fractionated into three components. One of these exclusively acylates two of the six tRNA(Leu) species present in this tissue. The remaining two enzyme fractions charge the other four tRNA(Leu) species equally well. Soybean hypocotyls appear to contain only the last two enzyme fractions.
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Kanabus et al. (1971) studied this question.
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