Today's Hours: 8:00am - 6:00pm
Lane Medical Library

Search

Filter Results

Did You Mean:

Search Results

Sort by
relevance
  • Book
    by Jerad M. Gardner, MD ; manuscript reviewed by Elizabeth Montgomery, MD, David Elder, MD.
    Print Unavailable: Checked out Recall Item
    Location
    Version
    Call Number
    Items
    Books: General Collection (Downstairs)
    2020
    RL95 .G37 2020
    1
  • Article
    Pumpen PP, Bauman VR, Dishler AV, Gren EIa.
    Genetika. 1978 Oct;14(10):1687-95.
    The synthesis of RNA by polar coat protein mutants f2sus3 and Qbetaam12 under suppressor (Escherichia coli S26R1E, Su+-1; H12R8a Su+-3) and non-suppressor (E. coli AB259; S26) conditions was examined. It was demonstrated that the synthesis of viral RNA under non-suppressor conditions in the presence of rifamycin produced the same gaussian pattern of rates as the synthesis of RNA by wild type phage or non-polar coat protein mutants. However, the total amount of RNA was decreased approximately 10-fold and the peak of RNA synthesis was displaced 7--10 min later. The number of infective centers was reduced also 10-fold indicating that a certain time-lapse was required to overcome the polarity of the parental RNA, this process being of single occurrence, exclusively on the parental RNA, but not on the progeny strains. As a consequence, it was concluded that the initiation of translation at the replicase cistron starts on the nascent RNA chains within the replicative complexes and not on the fully-synthesized templates with their complete secondary structure. The data obtained are not in contradiction with the hypothesis concerning the role of the repressor complex II (replicase-RNA) to slow down the synthesis of replicase and RNA in the coat protein mutants. The polarity can not be responsible probably for the blocking of the replicase cistron on the nascent chain following the block of coat protein cistron. Therefore, it appears appropriate to assume the existence of two binding sites for the replicase as repressor which is in keeping with the conclusions of Weissmann and co-workers.
    Digital Access Access Options