Plasma membrane electron transport in frog blood vessels.
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Date
2009-12
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Abstract
In an attempt to see if frog blood vessels possess a plasma membrane electron transport system, the postcaval vein
and aorta isolated from Rana tigrina were tested for their ability to reduce ferricyanide, methylene blue, and 2,6-
dichloroindophenol. While the dyes remained unchanged, ferricyanide was reduced to ferrocyanide. This reduction
was resistant to inhibition by cyanide and azide. Heptane extraction or formalin fi xation of the tissues markedly
reduced the capability to reduce ferricyanide. Denuded aortas retained only 30% of the activity of intact tissue. Our
results indicate that the amphibian postcaval vein and aorta exhibit plasma membrane electron transport.
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Rao Rashmi P, Nalini K, Rao J Prakasa. Plasma membrane electron transport in frog blood vessels. Journal of Biosciences. 2009 Dec; 34(6): 849-852.