Movement of ribosomes over messenger RNA in polysomes of rel + and rel - Escherichia coli strains.

Amino Acyl-tRNA Synthetases Bacterial Proteins/biosynthesis Carbon Isotopes Centrifugation, Density Gradient Escherichia coli/cytology,enzymology,metabolism Magnesium Mutation Polyribosomes RNA, Bacterial RNA, Messenger Ribosomes Time Factors Tritium Valine/metabolism

Bacterial Proteins Carbon Isotopes RNA, Bacterial RNA, Messenger Tritium Amino Acyl-tRNA Synthetases Valine Magnesium