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Purification of Leucine tRNA Isoaccepting Species from Soybean Cotyledons

II. RPC-2 Purification, Ribosome Binding, and Cytokinin Content ¹

^a Department of Horticulture, Purdue University, West Lafayette, Indiana 47907

Two of the six leucine isoaccepting tRNA species from soybean (Glycine max) cotyledons recognize U-beginning codons, and contain cytokinin moieties in their structure. These same two isoaccepting species have been shown to undergo quantitative changes in their relative amounts upon treatment with N⁶-benzyladenine in vivo. In addition a procedure has been developed for purification of the isoaccepting species of leucine tRNA from soybean cotyledons resulting in isoacceptors of minimum purity, calculated by amino acid acceptance capacity, of from 46 to 78% leucine tRNA.

³ Present address: Department of Agricultural Chemistry, Oregon State University, Corvallis, Oregon.

⁴ To whom correspondence should be addressed.

¹ Journal Paper No. 6633 of the Purdue Agricultural Experiment Station.