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Am. J. Trop. Med. Hyg., 24(1), 1975, pp. 96-100
Copyright © 1975 by The American Society of Tropical Medicine and Hygiene

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Physicochemical Properties of a Lipoprotein Antigen of Echinococcus Granulosus

Christine Oriol AND Rafael Oriol
Biochimie cellulaire, Collège de France, 11 place Marcelin-Berthelot, 75005 Paris, and Institut d'Immuno-Biologie, Hôpital Broussais, 96 rue Didot, 75674 Paris Cedex 14, France

Molecular weight and optical properties of the lipoprotein B, the main antigen produced by the parasite in sheep hydatid fluid, have been determined. By sedimentation equilibrium studies, its molecular weight has been found equal to 120,000. Circular dichroism and optical rotatory dispersion spectra are consistent with an {alpha}-helix content of about 50%, and this ordered structure is not completely destroyed by dissociation in guanidinium chloride. The ORD spectrum is discussed in relation to the biological function of the lipoprotein antigen.

Accepted for publication May 18, 1974.






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Copyright © 1975 by the American Society of Tropical Medicine and Hygiene.