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Table 1 Cellular RNA content and proportion of total RNA that is rRNA from several studies, and calculation of the cellular ribosome content.

From: A quantitative estimation of the global translational activity in logarithmically growing yeast cells

Total RNA content (g/cell) rRNA proportion in total RNA Ribosomes (molecules/cell)a Study
7.6 × 10-13 80%   [27]
4.9 × 10-13 84%   [30]
5.8 × 10-13 83%   [25]
7.0 × 10-13    [29]
10.0 × 10-13    [28]
  85%   [26]
7.1 ± 1.9 × 10-13 83 ± 2% 187,000 ± 56,000  
  1. The last row contains averages.
  2. a calculated as (total RNA * rRNA proportion)/MW*NA; where MW is the total molecular weight of ribosomal RNA contained within a ribosome (1.9 × 106 g/mol, from http://mips.gsf.de/proj/yeast/rna/rrna.html), and NA is Avogadro's number (6.022 × 1023 mol-1).