| STUDIES ON CELL METABOLISM AND CELL DIVISION : III. OXYGEN CONSUMPTION AND CELL DIVISION OF FERTILIZED SEA URCHIN EGGS IN THE PRESENCE OF RESPIRATORY INHIBITORS. | |
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MedLine Citation:
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PMID: 19873163 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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1. The effects of a number of respiratory inhibiting agents on the cell division of fertilized eggs of Arbacia punctulata have been determined. For eggs initially exposed to the reagents at 30 minutes after fertilization at 20 degrees C., the levels of oxygen consumption prevailing in the minimum concentrations of reagents which produced complete cleavage block were (as percentages of the control): In 0.4 per cent O(2)-99.6 per cent N(2), 32; in 0.7 per cent O(2)-99.3 per cent CO, 32; in 1.6 x 10(-4)M potassium cyanide, 34; in 1 x 10(-3)M phenylurethane, 70; in 4 x 10(-3)M 5-isoamyl-5-ethyl barbituric acid, 20; in 3 x 10(-4)M iodoacetic acid, 53. 2. The carbon monoxide inhibition of oxygen consumption and cell division was reversed by light. The percentage inhibition of oxygen consumption by carbon monoxide in the dark is described by the usual mass action equation with K, the inhibition constant, equal to approximately 60, as compared to values of 5 to 10 for yeast and muscle. In 20 per cent O(2)-80 per cent CO in the dark there was a slight stimulation of oxygen consumption, averaging 20 per cent. 3. Spectroscopic examination of fertilized and unfertilized Arbacia eggs reduced by hydrosulfite revealed no cytochrome bands. The thickness and density of the egg suspension was such as to indicate that, if cytochrome is present at all, the amount in Arbacia eggs is extremely small as compared to that in other tissues having a comparable rate of oxygen consumption. 4. Three reagents poisoning copper catalyses, potassium dithio-oxalate (10(-2)M), diphenylthiocarbazone (10(-4)M), and isonitrosoacetophenone (2 x 10(-3)M) produced no inhibition of division of fertilized Arbacia eggs. 5. These results indicate that the respiratory processes required to support division in the Arbacia egg may perhaps differ in certain essential steps from the principal respiratory processes in yeast and muscle. |
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Authors:
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G H Clowes; M E Krahl |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of general physiology Volume: 23 ISSN: 0022-1295 ISO Abbreviation: J. Gen. Physiol. Publication Date: 1940 Mar |
Date Detail:
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Created Date: 2010-06-23 Completed Date: 2010-06-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985110R Medline TA: J Gen Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 401-11 Citation Subset: - |
Affiliation:
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Lilly Research Laboratories, Marine Biological Laboratory, Woods Hole. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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Journal Information Journal ID (nlm-ta): J Gen Physiol ISSN: 0022-1295 ISSN: 1540-7748 Publisher: The Rockefeller University Press |
Article Information Download PDF  Copyright © Copyright, 1940, The Rockefeller Institute for Medical Research Received Day: 28 Month: 10 Year: 1939 Print publication date: Day: 20 Month: 3 Year: 1940 Volume: 23 Issue: 4 First Page: 401 Last Page: 411 ID: 2237936 PubMed Id: 19873163 |
| STUDIES ON CELL METABOLISM AND CELL DIVISION : III. OXYGEN CONSUMPTION AND CELL DIVISION OF FERTILIZED SEA URCHIN EGGS IN THE PRESENCE OF RESPIRATORY INHIBITORS | |
| G. H. A. Clowes | |
| M. E. Krahl | |
| From the Lilly Research Laboratories, Marine Biological Laboratory, Woods Hole |
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