the ribosomal subunits of one thermoacidophilic archaebacterium ( caldariella acidophila ) and of two reference eubacterial species ( bacillus acidocaldarius , escherichia coli ) were compared with respect to ribosome mass and protein composition by ( i ) equilibrium-density sedimentation of the particles in cscl and ( ii ) gel-electrophoretic estimations of the molecular weights of the protein and the rrna .
C0035553
ribosome
C0035701
rrna