Nissl stains the rough endoplasmic reticulum and polyribosomal
complexes in these cell bodies, which can be seen as Nissl granules under the light microscope.
Sucrose gradient ultra-centrifugation was effective in separating ribosomes not involved in protein synthesis (i.e., present in monoribosomal fraction) from ribosomes that were engaged in synthesis (i.e., in polyribosomal
* Capsular polysaccharide polyribosomal
phosphate (PRP)--outer membrane protein (OMP).
Ribosomes, free or grouped in polyribosomal
aggregates, were the most prominent cellular organelles.