THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN

1. Photosynthetic bacteria in water suspension break open when treated with supersonic vibration thus liberating the cell contents, including a water soluble protein to which is attached the otherwise water insoluble pigments, bacteriochlorophyll and carotinoids. Both types of pigments appear to be...

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Autor principal: French, C. S.
Formato: Texto
Lenguaje:English
Publicado: The Rockefeller University Press 1940
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2237943/
https://www.ncbi.nlm.nih.gov/pubmed/19873169
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author French, C. S.
author_facet French, C. S.
author_sort French, C. S.
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description 1. Photosynthetic bacteria in water suspension break open when treated with supersonic vibration thus liberating the cell contents, including a water soluble protein to which is attached the otherwise water insoluble pigments, bacteriochlorophyll and carotinoids. Both types of pigments appear to be combined with the same protein. 2. The protein pigment compound is insoluble in the region of pH 3.0 to 4.5 and in neutral solution can be completely precipitated by 0.5 saturated (NH(4))(2)SO(4). It is soluble in distilled water and adsorbable on fullers' earth. 3. Supersonic extracts of photosynthetic bacteria do not have the ability to carry on photosynthesis, but will act as a photocatalyst for the oxidation of ascorbic acid with visible or infrared radiation. The rate of the photochemical oxidation is proportional to the light intensity.
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spelling pubmed-22379432008-04-23 THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN French, C. S. J Gen Physiol Article 1. Photosynthetic bacteria in water suspension break open when treated with supersonic vibration thus liberating the cell contents, including a water soluble protein to which is attached the otherwise water insoluble pigments, bacteriochlorophyll and carotinoids. Both types of pigments appear to be combined with the same protein. 2. The protein pigment compound is insoluble in the region of pH 3.0 to 4.5 and in neutral solution can be completely precipitated by 0.5 saturated (NH(4))(2)SO(4). It is soluble in distilled water and adsorbable on fullers' earth. 3. Supersonic extracts of photosynthetic bacteria do not have the ability to carry on photosynthesis, but will act as a photocatalyst for the oxidation of ascorbic acid with visible or infrared radiation. The rate of the photochemical oxidation is proportional to the light intensity. The Rockefeller University Press 1940-03-20 /pmc/articles/PMC2237943/ /pubmed/19873169 Text en Copyright © Copyright, 1940, The Rockefeller Institute for Medical Research This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/).
spellingShingle Article
French, C. S.
THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN
title THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN
title_full THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN
title_fullStr THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN
title_full_unstemmed THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN
title_short THE PIGMENT-PROTEIN COMPOUND IN PHOTOSYNTHETIC BACTERIA : I. THE EXTRACTION AND PROPERTIES OF PHOTOSYNTHIN
title_sort pigment-protein compound in photosynthetic bacteria : i. the extraction and properties of photosynthin
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2237943/
https://www.ncbi.nlm.nih.gov/pubmed/19873169
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