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4tna is a 1 chain structure with sequence from Saccharomyces cerevisiae. This structure supersedes the now removed PDB entry 3tna. The March 2001 RCSB PDB Molecule of the Month feature on Transfer RNA by David S. Goodsell is 10.2210/rcsb_pdb/mom_2001_3. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.