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. Author manuscript; available in PMC: 2017 Feb 24.
Published in final edited form as: Annu Rev Biochem. 2009;78:305–334. doi: 10.1146/annurev.biochem.78.070507.135656

Figure 5.

Figure 5

Conserved sequences and secondary structure models corresponding to Moco and Wco RNAs. These RNAs exhibit characteristics of riboswitches, including a complex aptamer-like structure and gene control function. Many representatives reside immediately upstream of an AUG start codon and are predicted to function by sequestering the SD sequence (blue shading). The phylogenetic distributions and specific gene associations of these motifs suggest that RNAs containing the P3 element recognize Moco, while those lacking this stem bind the related coenzyme Wco.