Cations and ribosome structure. I. Effects on the 30S subunit of substituting polyamines for magnesium ion.

Binding Sites Centrifugation, Density Gradient Dialysis Escherichia coli/cytology,metabolism Magnesium/analysis,metabolism,physiology Osmolar Concentration Pancreas/enzymology Peptide Biosynthesis Phenylalanine/metabolism Protein Conformation Putrescine/pharmacology RNA, Bacterial/metabolism RNA, Ribosomal/metabolism Ribonucleases/pharmacology Ribosomes/analysis,drug effects,metabolism,physiology Spermidine/pharmacology Ultracentrifugation Viscosity

RNA, Bacterial RNA, Ribosomal Phenylalanine Ribonucleases Magnesium Spermidine Putrescine