prov:value
| - In the case, for example, of biological fluids such as blood serum, the constituent of interest may, for example, be an antigen, e.g. a peptide hormone, a steroid hormone, a drug or a virus (the term antigen is intended to include haptens and other similar substances), an antibody (which term includes other binding substances), or an antibody: antigen complex, or a single protein.
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