indirect immunofluorescence
Noun: A laboratory technique in immunology and cell biology that uses fluorescence microscopy to detect the presence of a specific antigen (target molecule) within a sample through a two-step, or "indirect," antibody binding process. It is called "indirect" because the fluorescent dye is not attached to the primary antibody that recognizes the antigen. Instead, a secondary antibody, which is fluorescently labeled and recognizes the primary antibody, is used for detection.
This term is used as a singular noun to name the technique itself. It is a specialized term found in scientific contexts. * Subject of a sentence: "Indirect immunofluorescence is often preferred for its signal amplification." * Object of a sentence: "The researcher performed indirect immunofluorescence on the tissue section." * Object of a preposition: "The antigen was localized using indirect immunofluorescence."
- "Indirect immunofluorescence confirmed the presence of viral proteins in the infected cells."
- "A major advantage of indirect immunofluorescence is that one labeled secondary antibody can be used with many different primary antibodies."
- "The protocol for indirect immunofluorescence involves fixing the cells, applying the primary antibody, washing, and then applying the fluorescent secondary antibody."
- The technique is often abbreviated as IIF in scientific literature and notes.
- It is frequently compared with direct immunofluorescence, where the primary antibody itself is fluorescently labeled.
- The term can be used attributively (like an adjective) to describe related nouns, e.g., "indirect immunofluorescence assay," "indirect immunofluorescence staining," or "indirect immunofluorescence microscopy."
- Immunofluorescence (n): The broader category of techniques using antibodies conjugated to fluorescent dyes to visualize antigens. Indirect immunofluorescence is a type of immunofluorescence.
- Direct immunofluorescence (n): A related technique where the primary antibody is directly conjugated to the fluorophore.
- Immunocytochemistry (n): A broader field of techniques for visualizing cellular components using antibodies; immunofluorescence is a common method within this field.
- Immunohistochemistry (n): Similar to immunocytochemistry but typically performed on tissue sections.
- Indirect immunofluorescence assay (IFA/IIFA) (n): A more formal synonym emphasizing it as a test or procedure.
- Indirect IF (n): A common abbreviation.
- Direct immunofluorescence (n): The contrasting technique where the primary antibody carries the fluorescent label.
- a method of using fluorescence microscopy to detect the presence of an antigen indirectly
