Initiation of protein synthesis: a critical test of the 30S subunit model.

Bacterial Proteins/biosynthesis Carbon Isotopes Centrifugation, Density Gradient Escherichia coli/cytology,metabolism Formates/metabolism Genetic Code Methionine/metabolism Models, Biological Peptides/analysis Polynucleotides/metabolism RNA, Messenger/metabolism RNA, Transfer/metabolism Ribosomes/metabolism Tritium Valine/metabolism

Bacterial Proteins Carbon Isotopes Formates Peptides Polynucleotides RNA, Messenger Tritium RNA, Transfer Methionine Valine