Purification and characterization of 30S ribosomal proteins from Bacillus subtilis: correlation to Escherichia coli 30S proteins.

Twenty proteins were isolated from the 30S ribosomal subunits of Bacillus subtilis and their amino acid compositions and amino-terminal amino acid sequences were determined. These results were compared with the data of Escherichia coli 30S ribosomal proteins and the structural correspondence of individual ribosomal proteins has been established between B. subtilis and E. coli. Post-translational modifications of amino-terminal amino acids of the ribosomal proteins which have been found in E. coli are almost absent in B. subtilis with the exception of acetylated forms of S9.

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