Cations and ribosome structure. II. Effects on the 50S subunit of substituting polyamines for magnesium ion.

Bacterial Proteins/isolation & purification,metabolism Dialysis Electrophoresis, Disc Electrophoresis, Polyacrylamide Gel Escherichia coli/cytology,metabolism Magnesium/metabolism,physiology Pancreas/enzymology Peptide Biosynthesis Phenylalanine/metabolism Phosphoric Acids/metabolism Protein Conformation Putrescine/pharmacology RNA, Bacterial/metabolism RNA, Ribosomal/metabolism Ribonucleases/pharmacology Ribosomes/drug effects,metabolism,physiology Spermidine/pharmacology Ultracentrifugation Viscosity

Bacterial Proteins Phosphoric Acids RNA, Bacterial RNA, Ribosomal Phenylalanine Ribonucleases Magnesium Spermidine Putrescine