| http://www.w3.org/ns/prov#value | - Detection is then possible by either directly (if the secondary capture molecule is directly observable (such as a fluorescently- or Au-labeled secondary antibody) or indirectly (using for example, secondary antibodies labeled with enzymes such as horseradish peroxidase (HRP) followed by flow over the first membrane of a solution producing an observable signal, such as precipitatable tetramethylbe
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