Document Detail

Localization of fluorescent compounds in the firefly light organ.
MedLine Citation:
PMID:  7373026     Owner:  NLM     Status:  MEDLINE    
Two fluorescent materials have been localized in the adult firefly light organ by fluorescence microscopy. One of these is located in photocyte granules, has a maximum emission between 510 and 540 nm, is more fluorescent in basic than acidic solution, and is unstable in ultraviolet light, phosphomolybdic acid, and potassium permanganate. It is thought to be luciferin. The fluorescence of this material is very dim in untreated fireflies but increases substantially following sustained light emission induced by synephrine or prolonged electrical stimulation. It is suggested that the luciferin of untreated animals is bound in the granules and that binding suppresses its fluorescence. The second fluorescent material is located in the dorsal layer of the light organ, particularly in the cells bordering on the photogenic layer. This material has a maximum emission between 510 and 520 nm, is relatively stable in ultraviolet light, and rapidly disappears when light organs are exposed to water. Its identity and function are unknown.
K N Smalley; D E Tarwater; T L Davidson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society     Volume:  28     ISSN:  0022-1554     ISO Abbreviation:  J. Histochem. Cytochem.     Publication Date:  1980 Apr 
Date Detail:
Created Date:  1980-07-26     Completed Date:  1980-07-26     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9815334     Medline TA:  J Histochem Cytochem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  323-9     Citation Subset:  IM    
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MeSH Terms
Azure Stains
Beetles / cytology*
Firefly Luciferin / analysis*
Methylene Blue
Microscopy, Fluorescence
Reg. No./Substance:
0/Azure Stains; 2591-17-5/Firefly Luciferin; 61-73-4/Methylene Blue

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

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