Formation in vitro of 1-methylguanine in 23-s RNA from Escherichia coli. The effects of spermidine and two proteins.

Bacterial Proteins Carbon Isotopes Cell Fractionation Centrifugation, Density Gradient Chromatography, Paper Enzyme Activation Enzymes Escherichia coli/cytology,enzymology Genetics, Microbial Guanine Nucleotides Hydrogen-Ion Concentration Kinetics Magnesium Methylation Methyltransferases Mutation RNA, Bacterial RNA, Ribosomal Ribosomes S-Adenosylmethionine Spermidine Tromethamine

Bacterial Proteins Carbon Isotopes Enzymes Guanine Nucleotides RNA, Bacterial RNA, Ribosomal Tromethamine S-Adenosylmethionine Methyltransferases Magnesium Spermidine