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Oxygen equilibrium ofPriapulus hemerythrin

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Summary

The hemerythrin-containing coelomic fluid ofPriapulus caudatus shows a relatively low O2 affinity (half-saturation O2 tension P50=8 mm at 10 °C) and a low O2 capacity (near 1 vol.%). O2 affinity is independent of pH but shows a large temperature sensitivity. A major role as a continuous O2 transporter seems to be excluded.

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Author information

Authors and Affiliations

  1. Institute of Biology, Odense University, DK-5230, Odense M, Denmark

    R. E. Weber & R. Fänge

  2. Department of Zoophysiology, University of Gothenburg, Gothenburg, Sweden

    R. E. Weber & R. Fänge

Authors
  1. R. E. Weber
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  2. R. Fänge
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Additional information

Acknowledgments. A major part of this work was carried out at the Kristineberg Marine Laboratory, Fiskebäckskil (Sweden) and in the Zoophysiology Department, Aarhus Universitet (Denmark).

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Weber, R.E., Fänge, R. Oxygen equilibrium ofPriapulus hemerythrin. Experientia 36, 427–428 (1980). https://doi.org/10.1007/BF01975127

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