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Extracellular silk fibres in Stannophyllum (Rhizopodea: Protozoa)

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Summary

The agglutinated shell or capsule of Stannophyllum zonarium, a deep sea rhizopod, contains a mass of extracellular proteinaceous fibres called linellae. They are 2–3 μm diameter, weakly positively birefringent and on examination by X-ray diffraction give an amorphous type of diagram. An amino acid analysis is notable for its very high glycine content and indicates that the molecule may be related to those found in arthropod silk proteins.

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Authors and Affiliations

  1. British Museum (Natural History), London

    R. H. Hedley & K. M. Rudall

  2. Department of Biophysics, The University, Leeds

    R. H. Hedley & K. M. Rudall

Authors
  1. R. H. Hedley
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  2. K. M. Rudall
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Additional information

We wish to thank Mr. G. S. Bell and Mr. C. G. Ogden for their help with the amino acid analysis and electron microscopy respectively.

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Hedley, R.H., Rudall, K.M. Extracellular silk fibres in Stannophyllum (Rhizopodea: Protozoa). Cell Tissue Res. 150, 107–111 (1974). https://doi.org/10.1007/BF00220384

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  • DOI: https://doi.org/10.1007/BF00220384

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