| http://www.w3.org/ns/prov#value | - The detection step may be done by chromogenic detection???e.g. the secondary antibody is labelled with an enzyme such as horseradish peroxidase or alkaline phosphatase, which is detected using an enzyme substrate such as 3,3???-diaminobenzidineor nitroblue tetrazolium chloride/5-bromo-4-chloro-3-indolyl-phosphate (toluidine salt), respectively.
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