title: [gamma-Irradiated ribosomes from Micrococcus radiodurans in a cell-free protein synthesizing system (author's transl)].
abstract: gamma-irradiation inactivation of isolated ribosomes of Micrococcus radiodurans was studied by examining poly U directed synthesis of polyphenylalanine. Ribosomes of M. radiodurans did not show significant gamma-radiation sensitivity up to a dose of approx. 11.6 k Gy. Cells of M. radiodurans take up more magnesium than E. coli cells unter the same conditions. The magnesium content of ribosomes of M. radiodurans was 18% higher than that of E. coli ribosomes. A possible relation between Mg2+-content and gamma-resistance is discussed.
mesh_terms: D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays; D007700:Kinetics; D008274:Magnesium / Q000378:metabolism; D008837:Micrococcus / Q000378:metabolism / Q000528:radiation effects*; D010452:Peptide Biosynthesis; D014176:Protein Biosynthesis / Q000187:drug effects*; D012270:Ribosomes / Q000378:metabolism / Q000528:radiation effects*
chemical_list: D008274:Magnesium
vernacular_title: gamma-Bestrahlte Ribosomen von Micrococcus radiodurans in einem System der zellfreien Proteinsynthese.