SEARCH Articles Figures Tables A library of Mj TyrRS mutants was generated by randomizing five residues in the tyrosine binding site. The crystai structure of Bacillus stearothermophilus TyrRS is shown with residues labeled in biack. Corresponding residues in the Methanococcus Jannaschii TyrRS are labeled in blue. Reproduced from L. Wang A. Brock B. Herberich P. G. Schultz, Science 2001, 292, 498-500, with permission from AAAS. [Publishers Imprint]