Document Detail

Polyamines and nucleic acid metabolism in chick embryo. Incorporation of labelled precursors into nucleic acids of subcellular fractions and polyribosomal patterns.
MedLine Citation:
PMID:  16742581     Owner:  NLM     Status:  PubMed-not-MEDLINE    
1. An increase in polyamine concentration, caused by inhibiting the amine oxidase activities with iproniazid, increased the incorporation of [(3)H]orotic acid into chick-embryo RNA and DNA. On the other hand, a decrease in polyamine concentration, obtained by causing an increase in amine oxidase activities, decreased [(3)H]orotic acid incorporation into nucleic acids. This was particularly evident for nuclear DNA and ribosomal RNA. 2. Polyribosomal patterns obtained by sucrose-density-gradient centrifugation showed highest radioactivity in the regions of 259s and 280s aggregates in those embryos in which the polyamine contents were enhanced, whereas a decrease in the radioactivity was observed when the polyamine concentrations were decreased. 3. The activity of DNA-dependent RNA polymerase, assayed in the same experimental conditions, also varied in the same fashion with changes in polyamine concentration.
G Moruzzi; B Barbiroli; C M Caldarera
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Biochemical journal     Volume:  107     ISSN:  0264-6021     ISO Abbreviation:  Biochem. J.     Publication Date:  1968 May 
Date Detail:
Created Date:  2010-06-25     Completed Date:  2010-06-25     Revised Date:  2010-09-15    
Medline Journal Info:
Nlm Unique ID:  2984726R     Medline TA:  Biochem J     Country:  England    
Other Details:
Languages:  eng     Pagination:  609-13     Citation Subset:  -    
Istituto di Chimica Biologica dell'Università di Bologna, Bologna, Italy.
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