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Updated: Jun 19, 2026
05:48
Rapid Generation of Amyloid from Native Proteins In vitro
Published on: December 5, 2013
ON ALBUMINOLYSINS AND THEIR RELATION TO PRECIPITIN REACTIONS
1Division of Bacteriology, Department of Medicine, Stanford University, California.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Complement fixation differs between reactions with soluble proteins and bacterial antigens. Bacterial immunization produces both cell-specific and protein-specific sensitizers, distinct from those in protein immunization.
Area of Science:
- Immunology
- Biochemistry
- Microbiology
Background:
- Complement fixation is a key immunological reaction.
- Distinguishing between antibody responses to soluble proteins and cellular antigens is crucial.
Purpose of the Study:
- To investigate complement fixation patterns in reactions involving soluble proteins versus bacterial antigens.
- To differentiate the types of sensitizers (amboceptors) produced by immunization with different antigens.
Main Methods:
- Analysis of complement fixation in precipitates and supernatant fluids from protein-antiserum and bacterial-antiserum reactions.
- Absorption experiments using washed bacteria to remove specific sensitizers from antisera.
Main Results:
- Complement fixation occurs in both precipitate and supernatant of bacterial reactions, unlike protein reactions.
- Bacterial immunization elicits both cytolytic and albuminolytic sensitizers, while protein immunization yields only albuminolytic sensitizers.
- Precipitating antibodies (albuminolytic sensitizers) are distinct from cell-binding sensitizers (cytolytic sensitizers).
Conclusions:
- Bacterial antigens elicit a broader range of immune responses compared to soluble protein antigens.
- The study differentiates between albuminolytic and cytolytic sensitizers, clarifying their roles in immune reactions.
- Findings support the existence of distinct sensitizers responsible for precipitin and cell-surface reactions.
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