UNIQUENESS OF BACTERIAL RIBOSOMES

Abstract
Comparison of the sedimentation coefficients of ribosomes from 26 species of molds and yeasts, 25 species of bacteria and 2 species of blue-green algae shows that they belong to 2 distinct classes, characterized, by mean values of 68.4 S0 20,w and 81.3 S0 2o w. The unique value of sedimentation coefficient of ribosomes of bacteria and blue-green algae may be used to define further this group.