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, 251 (6), 1808-16

Group Fractionation of Eukaryotic Ribosomal Proteins

  • PMID: 1254597

Group Fractionation of Eukaryotic Ribosomal Proteins

E Collatz et al. J Biol Chem.


The proteins of the subunits of rat liver ribosomes were fractionated by stepwise elution from carboxymethylcellulose with LiCl at pH 6.5. The 40 S ribosomal proteins were separated into five groups containing between 3 and 14 proteins; the 60 S proteins, into seven groups of 3 to 15. Only a comparatively small number of proteins occurred in appreciable amounts in more than one group. The number of relatively acidic proteins associated with the ribosomal subunits was larger than had been reported before: it is not known if they are initiation or translation factors or ribosomal structural proteins. The group fractionation procedure has proven valuable as the initial step in the isolation and characterization of rat liver ribosomal proteins.

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