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Aminoacyl-tRNA synthetases (ARSs) ligate amino acids to their cognate tRNAs. It has been suggested that mammalian ARSs are linked to the EF-1 complex for efficient channeling of aminoacyl tRNAs to ribosome. Here we systemically investigated possible interactions between human ARSs and the subunits of EF-1 (α, β, γ, and δ) using a yeast two-hybrid assay. Among the 80 tested pairs, leucyl- and histidyl-tRNA...