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The Immunochemistry of Allergens¹

VIII. PRECIPITIN FORMATION AND PASSIVE TRANSFER REACTIONS WITH ALLERGENIC PROTEINS FROM COTTONSEED AND CASTOR BEANS^,2

Abstract

The allergenic proteic-polysaccharidic fractions, CS-1A from cottonseed and CB-1A from castor beans, were precipitinogenic when administered to rabbits. The allergenic fractions were less uniformly effective than ovalbumin in stimulating precipitin-formation.

The passive-transfer technic provided a more sensitive method for detecting antibodies in sera than the precipitin-method.

The passive-transfer sensitizing capacity of antisera, preserved with 0.25 per cent phenol and stored at 6 C, remained essentially unchanged for nearly five years.

Footnotes

¹ Contribution from Allergen Investigations, Bureau of Agricultural and Industrial Chemistry, Agricultural Research Administration, U. S. Department of Agriculture.

² For Paper VII of this series see Coulson, Spies, and Stovens, J. Allergy 1945, 16, 176–183.

³ Now with Western Regional Research Laboratory, Albany, California.