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Thermal Vent Clam (Calyptogena magnifica) Hemoglobin
Robert C. Terwilliger, Nora B. Terwilliger and Alissa Arp
New Series, Vol. 219, No. 4587 (Feb. 25, 1983), pp. 981-983
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1690735
Page Count: 3
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A heterodont bivalve mollusk Calyptogena magnifica, from the East Pacific Rise and the Galápagos Rift hydrothermal vent areas, contains abundant hemoglobin in circulating erythrocytes. No other known heterodont clam contains a circulating intracellular hemoglobin. The hemoglobin is tetrameric and has a relatively high oxygen affinity, which varies only slightly between 2° and 10° C. The presence of hemoglobin in the clam may facilitate the transport of oxygen to be used in chemoautotrophic hydrogen sulfide metabolism.
Science © 1983 American Association for the Advancement of Science