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Occurrence of ValRS:EF1A:EF1B complexes or of “free” ValRS in Eukaryota. The conserved catalytic (CAT) and anticodon-binding (ABD) domains are in green. The appended tRNA-binding domain (tRBD) is indicated in red, the protein-binding domain (PBD) only recovered in Deuterostomia, required for association with elongation factor 1, is in yellow.
