Sedimentation coefficients of RNA from 70S and 80S ribosomes.

Abstract
The sedimentation coefficients of ribo-somal RNA''s from 5 fungal and 5 bacterial species were determined in EDTA and at an ionic strength of 0.1. It was found that fungal rRNA''s have larger values than do their bacterial counterparts. It is suggested that the difference in sedimentation coefficients of eucaryo-tic and procaryotic ribosomes is due primarily to their rRNA''s.