The ribosomal RNA (rRNA) biosynthesis is the most energy consuming process in all living cells and the majority of total transcription activity is dedicated for synthesizing rRNA. The cells may adjust the synthesis of rRNA with the availability of resources. rRNA is mainly synthesized by RNA polymerase I that is composed of 14 subunits. Deletion of RPA12, 14, 39 and 49 are viable. RPA12 is a ve...

The two components of virginiamycin, M and S, separately exerted a reversi ble bacteriostatic activity on Bacillus subtilis. Their combination increased by a hundredfold the inhibitory activity of each factor and induced a loss of viability of bacteria. Such an irreversible step was preceded by a reversible phase, which was characterized by a long lag in colony formation. Very short incubation ...

Previous studies have recorded Spironucleus torosus Poynton et Morrison, 1990 from several species of gadoid fishes, including the only freshwater gadoid, the burbot Lota lota (L.). Two morphologically different isolates of S. torosus have been described (elongate and pyriform). Both have been found in saltwater, while only the elongate has been found in freshwater. To address the conspecificit...

Ribosomes were isolated and ribosomal RNA (rRNA) was prepared from leukemic cells derived from the venous blood of patients with acute myeloblastic leukemia, acute undifferentiated leukemia, subacute myelocytic leukemia, chronic lymphocytic leukemia, leukemic lymphosarcoma, leukemic reticuloendotheliosis, a cultured Burkitt lymphoma cell line, and phytohemagglutinin-stimulated normal lymphocyte...

Discrimination of Staphylococcus aureus strains, isolated from camel abscesses and mastitic milk of camel, cattle and goats, on the basis of 16S-23S ribosomal RNA intergenic space polymorphism was carried out. Two sets of primers were used for amplification of DNA of intergenic space; the one having a highly conserved sequence in eubacterial 23S rRNA transcript, while the other having less cons...