horseradish peroxidase
noun
horse·rad·ish peroxidase
-ˌrad-ish-, -ˌred- 
: a peroxidase that occurs in the root of the horseradish (Armoracia lapathifolia of the mustard family), that produces a distinctive color when exposed to an appropriate solution, and that is used as a label for antibody-antigen complexes, as a cytochemical marker in immunohistochemical staining, and as a tracer to follow the course of individual neurons since it is transported by most neural pathways
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“Horseradish peroxidase.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/horseradish%20peroxidase. Accessed 29 Nov. 2024.
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