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Free amino acids and nucleic acid content of cell nuclei isolated by a modification of Behrens' technique.
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MedLine Citation:
PMID:  15422114     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
1. Nuclei were prepared from frozen rat liver by a modification of the technique of Behrens, and were studied with regard to the content of free amino acids and nucleic acid. 2. Under rigorously controlled conditions, preparations of nuclei are obtained by the Behrens' method which form a gel in the presence of 5 or 10 per cent NaCl or of water plus a small amount of dilute alkali; whereas when conditions are less rigorously controlled, nuclei are obtained which form no such gel. The property of forming gels with alkali is probably characteristic of all cell nuclei which have not undergone autolysis. 3. Nuclei prepared by the Behrens' technique contain the enzymes arginase, catalase, and esterase in very appreciable concentrations. 4. The free amino acids of the isolated cell nuclei, as well as of other liver cell fractions, have been investigated using the technique of paper chromatography. 5. The chromatographic patterns of the free amino acids of whole cells, ground cytoplasm, and isolated cell nuclei were very similar or identical. A feature of interest in these chromatograms was the faintness or absence of the spots due to a number of the essential amino acids, as compared to the intensities of the spots due to glycine, alanine, and glutamic acid. Glutathione was present in the isolated nuclei as well as in the whole cells. 6. Chromatograms made from hydrolysates of nuclei showed high concentrations of the essential amino acids and were similar to chromatograms of hydrolysates of typical proteins.
Authors:
A L DOUNCE; G H TISHKOFF; S R BARNETT; R M FREER
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of general physiology     Volume:  33     ISSN:  0022-1295     ISO Abbreviation:  J. Gen. Physiol.     Publication Date:  1950 May 
Date Detail:
Created Date:  1950-12-01     Completed Date:  2004-09-30     Revised Date:  2011-07-25    
Medline Journal Info:
Nlm Unique ID:  2985110R     Medline TA:  J Gen Physiol     Country:  Not Available    
Other Details:
Languages:  eng     Pagination:  629-42     Citation Subset:  OM    
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MeSH Terms
Descriptor/Qualifier:
Amino Acids*
Cells*
Nucleic Acids*
Chemical
Reg. No./Substance:
0/Amino Acids; 0/Nucleic Acids
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): J Gen Physiol
ISSN: 0022-1295
ISSN: 1540-7748
Publisher: The Rockefeller University Press
Article Information
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Copyright © Copyright, 1950, by The Rockefeller Institute for Medical Research
Received Day: 28 Month: 12 Year: 1949
Print publication date: Day: 20 Month: 5 Year: 1950
Volume: 33 Issue: 5
First Page: 629 Last Page: 642
ID: 2147208
PubMed Id: 15422114

FREE AMINO ACIDS AND NUCLEIC ACID CONTENT OF CELL NUCLEI ISOLATED BY A MODIFICATION OF BEHRENS' TECHNIQUE
Alexander L. Dounce
Garson H. Tishkoff
Shirley R. Barnett
Richard M. Freer
From the Departments of Biochemistry and Pathology, School of Medicine and Dentistry, University of Rochester, Rochester, New York


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