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Three-dimensional representation of a Sarcin motif[29]. The red, green and blue atomic structures correspond to nucleotides 210-229, 1367-2057, and 2689-2705 of the 50S rRNA from H. Marismortui (PDB ID 1S72). The Sarcin loop is an example of a structural motif that has a highly conserved three-dimensional reality not necessarily evident in the sequence of the RNA. Numbering is indicated for black structure.
