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tRNASer acceptor stem: conformation and hydration of a microhelix in a crystal structure at 1.8 A resolution

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The crystal structure of a serine-specific tRNA acceptor-stem microhelix, the binding site for the seryl-tRNA synthetase, was solved by X-ray analysis. This seven-base-pair tRNA(Ser) microhelix forms endless rows of helices in the crystal lattice, with two hel... ...