提取能导致苯丙酮尿症（PKU）的基因突变.患这种病的人不能分解氨基酸苯丙氨酸，这会导致严重的认知损坏。

Take the gene mutation that causes phenylketonuria, or PKU. People with the disease can't break down the amino acid phenylalanine, a problem that can lead to severe cognitive damage.

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这两个氨基酸从丙酮酸获得它们的碳架。

These two amino acids derive their carbon skeletons from pyruvate.

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肝脏是从红细胞衍生的丙酮酸盐和乳酸盐以及氨基酸前体中进行糖异生的主要位点。

The liver is the major site of gluconeogenesis from red blood cell–derived pyruvate and lactate and from amino acid precursors.

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