Formation of guanosine tetraphosphate (magic spot I) in homologous and heterologous systems.

Adenine Nucleotides/pharmacology Animals Brain Carbon Radioisotopes Cattle Cyclic AMP/pharmacology Cytosol Escherichia coli/cytology,drug effects,metabolism Guanine Nucleotides/biosynthesis Hybridization, Genetic Methionine Mitochondria Organ Specificity Phenylalanine Poly U RNA, Transfer Reticulocytes Ribosomes/metabolism Saccharomyces cerevisiae/cytology Species Specificity Spectrophotometry, Ultraviolet

Adenine Nucleotides Carbon Radioisotopes Guanine Nucleotides Poly U Phenylalanine RNA, Transfer Methionine Cyclic AMP