Assertion: tryptophan | /r/HasProperty | shishu
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Source sentences:
text: Sulforaphane, a constituent of broccoli, and curcumin (a constituent of the spice turmeric), are also antagonistic to the mutagenic impact of some decomposition products of tryptophan (Shishu, et al., 2002; Shishu & Kaur, 2003).