Summary
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1)
24 proteins of the small subunit of rat liver ribosomes were isolated by detachment of ribosomal proteins from the subunits bound to DEAE-Sephadex A-25 by LiCl and β-chlorethanol-HCl and subsequent ion exchange chromatography and gel filtration of the prefractionated protein mixtures.
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2)
The amino acid compositions of the isolated proteins are fairly similar, but most of them are different from each other.
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3)
The tryptic peptide patterns of the isolated proteins point to differences in the primary structure.
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4)
The molecular weights estimated by different methods are in the range from 9700 to 30 600. The mean value of the molecular weights is 19 200.
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5)
The number of proteins and the sum of their molecular weights point to an average of one copy of each protein per small ribosomal subunit.
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Communicated by H. G. Wittmann
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Westermann, P., Bielka, H. Studies on proteins of animal ribosomes. Molec. Gen. Genet. 126, 349–356 (1973). https://doi.org/10.1007/BF00269444
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DOI: https://doi.org/10.1007/BF00269444