Lunasin is a peptide from soybean seeds which has been demonstrated to have anticancer properties. It has also been reported in cereal seeds: wheat, rye, barley and Triticale. However, extensive searches of transcriptome and DNA sequence databases for wheat and other cereals have failed to identify sequences encoding either the lunasin peptide or a precursor protein. This raises the question of the origin of the lunasin reported in cereal grain.

中文翻译：

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谷物种子中的 Lunasin：起源是什么？

Lunasin 是一种来自大豆种子的肽，已被证明具有抗癌特性。在谷类种子中也有报道：小麦、黑麦、大麦和黑小麦。然而，对小麦和其他谷物的转录组和 DNA 序列数据库的广泛搜索未能识别编码 lunasin 肽或前体蛋白的序列。这提出了谷类中报道的lunasin来源的问题。