Document Detail

The modulation of membrane fluidity by hydrogenation processes. III. The hydrogenation of biomembranes of spinach chloroplasts and a study of the effect of this on photosynthetic electron transport.
MedLine Citation:
PMID:  476095     Owner:  NLM     Status:  MEDLINE    
A method is reported for the in situ modification of the lipids of isolated spinach chloroplast membranes. The technique is based on a direct hydrogenation of the lipid double bonds in the presence of the catalyst, chlorotris(triphenylphosphine)rhodium (I). The pattern of hydrogenation achieved suggests that the catalyst distributes amongst all of the membranes. The polyunsaturated lipids within the membranes are hydrogenated at a faster rate and at an earlier stage than are the monoenoic lipids. Whilst addition of the catalyst to the chloroplast causes an initial 10--20% decrease in Hill activity, saturation of up to 40% of the double bonds present can be accomplished without causing further significant alterations in photosynthetic electron transport processes or marked morphological changes of the chloroplast structure as observed in the electron microscope.
C J Restall; P Williams; M P Percival; P J Quinn; D Chapman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochimica et biophysica acta     Volume:  555     ISSN:  0006-3002     ISO Abbreviation:  Biochim. Biophys. Acta     Publication Date:  1979 Jul 
Date Detail:
Created Date:  1979-11-21     Completed Date:  1979-11-21     Revised Date:  2000-12-18    
Medline Journal Info:
Nlm Unique ID:  0217513     Medline TA:  Biochim Biophys Acta     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  119-30     Citation Subset:  IM    
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MeSH Terms
Chloroplasts / metabolism*,  ultrastructure
Chromatography, Gas
Electron Transport
Fatty Acids / analysis
Intracellular Membranes / metabolism*,  ultrastructure
Membrane Fluidity*
Membrane Lipids / analysis
Reg. No./Substance:
0/Fatty Acids; 0/Membrane Lipids

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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