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Signature sequences (boxed) in acetolactate synthase (a) and asparginyl-tRNA synthetase (b) showing a grouping of the Deinococcus-Thermus species with archaebacteria and gram-positive bacteria. Similar to the Hsp60 protein (Fig. 10), these signatures were introduced in an ancestral gram-negative lineage after the branching of the Deinococcus-Thermus group.
