title: Consequence of amber mutation on the size of polyribosomes.
mesh_terms: D003090:Coliphages / Q000302:isolation & purification; D004926:Escherichia coli; D005815:Genetic Code; D005827:Genetics, Microbial; D008967:Molecular Biology; D009154:Mutation; D011523:Protoplasts; D012270:Ribosomes; D013053:Spectrophotometry; D014461:Ultracentrifugation