Enzyme linked immunosorbent assay (ELISA) is an experimental technique widely used in the fields of biochemistry and immunology, primarily for detecting and measuring the presence and concentration of specific proteins in samples. The application range of enzyme-linked immunosorbent assay (ELISA) is very wide and can be used for various detection purposes, some of which include:

Protein concentration determination: Enzyme linked immunosorbent assay (ELISA) can be used to determine the concentration of specific proteins in a sample, which is crucial for biological research and medical diagnosis.

Cytokine detection: used to determine the levels of cytokines, growth factors, etc. in biological samples, which helps to understand the immune process.

Food testing: used to detect specific proteins, toxins, or contaminants in food.

Virus detection: used to detect viruses or virus antibodies in body fluids.

Genetic research: Used to detect interactions between DNA, RNA, or proteins, it is very useful for genetic research and gene expression analysis.

Immune testing: ELISA can be used to detect and quantify antibodies or antigens in body fluids. For example, used for detecting infectious diseases, autoimmune diseases, etc.

Overall, enzyme-linked immunosorbent assay (ELISA) is a sensitive and high-throughput experimental technique suitable for research and applications in various fields of biology and medicine. Different types of ELISA techniques (such as indirect ELISA, direct ELISA, competitive ELISA, etc.) can be selected according to specific experimental purposes.