phenylalanine
phenylalanine — 名詞
1. One of the building blocks of protein that the human body cannot produce on its
苯丙胺酸
人體無法自行合成的必需胺基酸
One of the building blocks of protein that the human body cannot produce on its own and must obtain from food. Found in meat, eggs, fish, dairy products, and some artificial sweeteners, it is converted by the liver into another amino acid called tyrosine, which the body uses to make important chemicals for the brain and nervous system.
Babies born with phenylketonuria cannot break down phenylalanine, so they must follow a strict low-protein diet from birth.
患有苯酮尿症的嬰兒無法分解苯丙胺酸，因此從出生起就必須嚴格遵守低蛋白飲食。
passive: cannot break down + low-protein diet for PKU patients
Ayesha checked the label carefully because her son needed to limit his phenylalanine intake.
Ayesha 仔細檢查了標籤，因為她兒子需要限制苯丙胺酸的攝取量。
collocation: phenylalanine intake
The lab technician measured Henrik's phenylalanine levels after the new medication to check his liver function.
實驗室技術員在 Henrik 服用新藥後測量了他的苯丙胺酸濃度，以確認他的肝功能。
Many diet sodas contain aspartame, which breaks down into phenylalanine inside the body.
許多低卡汽水含有阿斯巴甜，這種成分在體內會分解成苯丙胺酸。
Kian's doctor explained that a phenylalanine-restricted diet could prevent brain damage from PKU.
Kian 的醫生解釋說，限制苯丙胺酸的飲食可以預防苯酮尿症造成的腦損傷。
用法筆記
Primarily used in medical and biochemical contexts. Frequently appears alongside phenylketonuria (PKU), a genetic disorder in which the body cannot metabolise this amino acid.