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American Zoologist 1997 37(6):575-584; doi:10.1093/icb/37.6.575
© 1997 by The Society for Integrative and Comparative Biology
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Molecular Approaches to Understanding Salinity Adaptation of Estuarine Animals1

DAVID W. TOWLE2
Department of Biology, Lake Forest College Lake Forest, Illinois 60045 and Mount Desert Island Biological Laboratory Salsbury Cove, Maine 04672

Correspondence: 2 E-mail: towle{at}lfc.edu

The molecular processes by which estuarine organisms adjust to salinity change are the central focus of this review, with emphasis on identifying the relevant mechanisms in euryhaline crustaceans using the techniques of molecular biology. This review is not intended to be complete with respect to ecological and physiological aspects but rather is an attempt to outline a molecular approach which other investigators may find useful as they address their own specific questions. Membrane transporters of sodium ions serve as the major focus, beginning with an examination of candidate transport systems in gill epithelial cells. Particular emphasis is placed on the recent identification and sequencing of a putative Na+/H+ antiporter cDNA from gills of the green shore crab Carcinus maenas


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