spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ahlgren, J. A.
Right arrow Articles by DeVries, A. L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ahlgren, J. A.
Right arrow Articles by DeVries, A. L.

Journal of Experimental Biology, Vol 137, Issue 1 549-563, Copyright © 1988 by Company of Biologists

JOURNAL ARTICLES

Freezing avoidance and the distribution of antifreeze glycopeptides in body fluids and tissues of Antarctic fish

JA Ahlgren, CC Cheng, JD Schrag and AL DeVries
University of Illinois, Urbana 61801.

The distribution of antifreeze glycopeptides (AFGPs) in the body fluids and tissues of antarctic notothenioid fish was determined. In Dissostichus mawsoni (Norman), the peritoneal, pericardial and extradural fluid, like the blood, contained all eight AFGPs and in concentrations sufficient to depress freezing points below that of sea water (-1.9 degree C). Secreted fluids including urine, endolymph and aqueous and vitreous humour either lack all AFGPs or have very low concentrations of only the low molecular weight forms and have freezing points of about -1.0 degree C, and are therefore undercooled with respect to environmental temperature. Fluids with high concentrations of AFGPs also contain high levels of proteins similar to plasma proteins. Systemic administration of tritiated AFGPs in the closely related species Trematomus bernacchii (Boulenger) yielded a distribution pattern similar to that of the native AFGPs in D. mawsoni. This suggests passive distribution of AFGPs into the various fluid compartments following secretion from the liver; a pattern typical of secreted blood proteins. Tissue distribution of AFGPs was determined by comparison with that of the extracellular space marker [14C]polyethylene glycol. AFGPs were found in the interstitial fluid of all body tissues examined except brain tissue. No tissue showed any intracellular accumulation of tritiated AFGPs from the blood.


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
K. Praebel and H. Ramlov
Antifreeze activity in the gastrointestinal fluids of Arctogadus glacialis (Peters 1874) is dependent on food type
J. Exp. Biol., July 1, 2005; 208(13): 2609 - 2613.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1988