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It has often been suggested that precursors to mitochondrial aminoacyl-tRNA synthetases are likely carriers for mitochondrial import of tRNAs in those organisms where this process occurs. In plants, it has been shown that mutation of U 70 to C 70 in Arabidopsis thaliana tRNA Ala (UGC) blocks aminoacylation and also prevents import of the tRNA into mitochondria. This suggests that interaction of tRNA Ala with alanyl-tRNA synthetase (AlaRS) is necessary for import to occur. To test whether thisdoi:10.1074/jbc.275.18.13291 pmid:10788435 fatcat:n5cewn6nsngwte6g2c7fhy33te