CP-2156 Life In The Universe

Figure 5. Views of the chain elongation yeast tRNAPhe and the initiator E. coli The computer drawing emphasizes the backbone with a thicker line. In the upper side views, the stippled ribbon is added to facilitate tracing of the backbone. The brackets show the position of the anticodon base triplet. The major difference shown in this view is at the acceptor end, where the 3' OH end of E. coli tRNAfMet is folded back on the acceptor stem; in yeast tRNAPhe it continues to form part of a single-stranded helix. The lower end views are made looking down the acceptor-T stem helices, with a hole in their center. It can be seen that the anticodon loop folding is different in the two molecules. U33 is crosshatched in the bottom views. In the upper side views, the U33 can be seen to have different positions in the two molecules.

Figure 5. Views of the chain elongation yeast tRNAPhe and the initiator E. coli tRNA subscript f superscript MetThe computer drawing emphasizes the backbone with a thicker line. In the upper side views, the stippled ribbon is added to facilitate tracing of the backbone. The brackets show the position of the anticodon base triplet. The major difference shown in this view is at the acceptor end, where the 3' OH end of E. coli tRNA subscript f superscript Met is folded back on the acceptor stem; in yeast tRNAPhe it continues to form part of a single-stranded helix. The lower end views are made looking down the acceptor-T stem helices, with a hole in their center. It can be seen that the anticodon loop folding is different in the two molecules. U33 is crosshatched in the bottom views. In the upper side views, the U33 can be seen to have different positions in the two molecules.

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