Which of the following is a substrate commonly associated with alkaline phosphatase in diagnostic assays?

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Multiple Choice

Which of the following is a substrate commonly associated with alkaline phosphatase in diagnostic assays?

Explanation:
Alkaline phosphatase detects substrates that release a colored signal after dephosphorylation. In diagnostic settings, Naphthol-AS-phosphate is a classic substrate: the enzyme removes the phosphate group and the liberated naphthol-AS couples with a diazonium salt to form a colored precipitate at the target site, giving a visible signal for immunohistochemical staining or similar assays. The other options are tied to peroxidase-based detection systems (hydrogen peroxide as the oxidant, and chromogens like tetramethylbenzidine or diaminobenzene), not to alkaline phosphatase.

Alkaline phosphatase detects substrates that release a colored signal after dephosphorylation. In diagnostic settings, Naphthol-AS-phosphate is a classic substrate: the enzyme removes the phosphate group and the liberated naphthol-AS couples with a diazonium salt to form a colored precipitate at the target site, giving a visible signal for immunohistochemical staining or similar assays. The other options are tied to peroxidase-based detection systems (hydrogen peroxide as the oxidant, and chromogens like tetramethylbenzidine or diaminobenzene), not to alkaline phosphatase.

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