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(A) Decoding site of E. coli wild-type (Proteobacteria). Four nucleotide positions depicted in green represent residues that are specific for E. coli 16S rRNA. (B) Decoding site of M. smegmatis wild-type (Mycobacteria). (C) Decoding site of M. smegmatis mutagenised to correspond to the polymorphism observed in E. coli i.e., Eco4.
