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This is tRNA-Phe, structure determined by S.-H. Kim, PDB ID 6TNA. This
is the classic L shape characteristic of all tRNAs. Note the coaxial
stacking of the acceptor stem and the TYC stem,
and of the anticodon stem and the D stem. Tertiary structure is held
together by non-Watson Crick base pairs and specifically bound Mg++
ions. The chain is colored in a gradient from 5' (blue) to 3' (red).
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