Document Detail


Spectral characterization of the neuronal pigments of Aplysia juliana.
MedLine Citation:
PMID:  435517     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Spectral analysis at liquid N2 temperature of the circumesophageal ganglia of Aplysia juliana showed that carotenoids and a hemoglobin-like pigment are contained in concentrations of approx. 25 and 3 micronM, respectively, in the whole ganglia. Microspectrophotometrical measurements of Aplysia neurons indicated that the carotenoids reside on lipochondria in a concentration of approx. 38 mM. In addition to lipochondria, two types of pigmented particulate having absorption maxima at about 512 and 525 nm, respectively, were found in the neurons. The neuronal carotenoids consist of violaxanthin, beta-carotene and one minor component; among them the first occupies approx. 77% of total carotenoids. Two principal absorption maxima of the carotenoids, when existing in both ganglial homogenates and Triton X-100 extracts, show a red shift of 10 nm compared with those of free pigments in hexan. The red shift may be interpreted as due to the solvation of the carotenoids by surrounding lipids.
Authors:
K Uéda; K Kawai
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochimica et biophysica acta     Volume:  584     ISSN:  0006-3002     ISO Abbreviation:  Biochim. Biophys. Acta     Publication Date:  1979 May 
Date Detail:
Created Date:  1979-07-28     Completed Date:  1979-07-28     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  0217513     Medline TA:  Biochim Biophys Acta     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  339-45     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Aplysia / analysis*
Carotenoids* / isolation & purification
Ganglia / analysis
Neurons / analysis*
Pigments, Biological* / isolation & purification
Polyethylene Glycols
Spectrophotometry
Chemical
Reg. No./Substance:
0/Pigments, Biological; 0/Polyethylene Glycols; 36-88-4/Carotenoids

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


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