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XB-ART-32372
Mol Gen Genet 1976 Dec 31;1424:317-31.
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Molecular weight distribution of ribosomal proteins from several vertebrate species.

Martini OH , Gould HJ .


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Two-dimensional polyacrylamide gel electrophoresis of proteins from the separated ribosomal subunits of rabbit reticulocytes, rabbit liver, mouse liver, rat liver, chicken liver, and toad liver was performed using the "pH 4.5/SDS" system previously described (Martini and Gould, 1975), with internal standards to measure the molecular weight distributions. With few exceptions, the patterns were remarkably similar, indicating a high degree of conservation during evolution of both net charge (largely determining mobility in the first dimension) and size (determining mobility in the second dimension). The aggregate mass (sum of molecular weights) of both small and large subunit proteins, about 0.65 X 10(6) and 0.95 X 10(6) daltons respectively, were invariant. These figures are significantly smaller than the hydrodynamically determined mass of protein in the subunits. The implications of this discrepancy, which is opposite that found in the prokaryotes, is discussed.

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References [+] :
Bickle, Differences in size and number of 80 S and 70 S ribosomal proteins by dodecyl sulfate gel electrophoresis. 1971, Pubmed