Abstract
Changes in the 300 MHz proton NMR spectrum of yeast tRNA Phe induced by the removal of the Y-base from the anticodon loop are reversed when the dye proflavine is incorporated in its place. These observations correlate with our earlier interpretation of the NMR data that removal of the Y-base causes a change in the conformation of the anticodon stem. Such changes in stem conformation may in part be responsible for the differences in the biochemical properties of tRNA Phe, tRNA Phe PF and tRNA Phe −Y.
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