What sulfur-containing compounds found in *Raphanus sativus var. niger* are precursors to isothiocyanates?
Answer
Glucosinolates
The perceived medicinal strength and characteristic pungent taste of the black radish are attributed to its content of glucosinolates. These compounds are categorized as sulfur-containing chemicals naturally present in cruciferous vegetables. Glucosinolates themselves are precursors; they only become biologically active isothiocyanates when the plant cell structure is broken down, which occurs through mechanical actions like chewing or grating the root. This conversion is critical for releasing the agents studied for their influence on cellular health markers.

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