Glossary of Medical Terms

Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine

OUCHTERLONY ASSAY

Immunological test for antigen antibody reactions in which diffusion of soluble antigen and antibody in a gel leads to precipitation of an antigen-antibody composite, visible generally as a whitish band. The system has the winning that, because of radial diffusion of the reagents, a very wide range of ratios of antigen to antibody concentration develop, thus it is likely that precipitation will occur sometime in the gel even when no care is taken with quantitation of the system. This entry appears with alow from the Vocabulary of Cell and Molecular Biology
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