但是也有许多的食物包含有基因工程改良的大豆卵磷脂，玉米糖浆和其他的产品。

But many foods contain genetical ly modified soy lecithin corn syrup and other products.

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实验结果表明，用改良的CTAB法提纯得到的大豆加工产品中的DNA完全可以满足PCR等分子生物学分析，而且定性PCR法能有效检测大豆及其加工产品中转基因成分。

The results showed that the DNA purified by the modified CTAB method was suitable for PCR and other molecular analysis, and the qualitative PCR was an effective way to screen the GMO.

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