Multiple Choice
What is the major difference between agglutination and precipitation reactions?
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26. Applications of the Immune Response
Immunoassays Detecting Antigen-Antibody Aggregates
Multiple Choice
The formation of an insoluble antibody-antigen complex is a characteristic of which immunoassay technique?
A
Western blotting.
B
Precipitation reactions.
C
Agglutination reactions.
D
Solubility reactions.
Verified step by step guidance1
Understand the nature of the antibody-antigen interaction: when antibodies bind to soluble antigens, they can form large, insoluble complexes that precipitate out of solution.
Recognize that this formation of insoluble complexes is the hallmark of precipitation reactions, a type of immunoassay where visible precipitates indicate antigen-antibody binding.
Differentiate precipitation reactions from agglutination reactions, where antibodies cause particulate antigens (like cells or beads) to clump together rather than form a soluble precipitate.
Note that Western blotting is a technique used to detect specific proteins separated by electrophoresis and does not primarily rely on the formation of insoluble complexes in solution.
Conclude that the immunoassay technique characterized by the formation of an insoluble antibody-antigen complex is the precipitation reaction.
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