methionine
メチオニン
解説 Definition
タンパク質に含まれる硫黄を含む必須アミノ酸です。体内で合成できず、食事から摂取する必要があります。
Methionine is an essential amino acid, which means the body needs it but cannot make enough of it on its own. It is found in protein foods and is important for growth and normal body functions. This word is mainly used in nutrition, biology, and medicine.
覚え方のコツ Memory Tip
まず「-ine で終わるのでアミノ酸名っぽい」という形でひっかける。methionine は栄養・生化学でほぼ必ず essential amino acid と一緒に出てきて、「体内で作れず食事から取るもの」とセットで覚えると定着しやすい。さらに cysteine と並ぶ sulfur-containing amino acid の仲間として置くと、単なる成分名でなく“硫黄をもつ必須アミノ酸”として輪郭が立つ。metformin など似たつづりの別語と混同しないこと。
The ending `-ine` often appears in amino acid names, so that shape is a useful first clue. Remember methionine together with `essential amino acid`, because it is usually learned in that set. It also pairs well with cysteine as a sulfur-containing amino acid, which makes it more distinctive. Do not mix it up with similar-looking words like `metformin`.
例文
Methionine is an essential amino acid for human health.
メチオニンは人間の健康に不可欠なアミノ酸です。
Foods rich in methionine include meat, fish, and eggs.
メチオニンが豊富な食品には、肉、魚、卵が含まれます。
Methionine plays a crucial role in protein synthesis.
メチオニンはタンパク質合成において重要な役割を果たします。
methionine の類義語・関連語
類義語
methionine の語源・成り立ち Etymology
methionine は化学語の meth-「メチル」、ギリシャ語 theion「硫黄」由来の thio-、物質名語尾 -ine からできた語です。名の中に「メチル基と硫黄をもつアミノ酸」という特徴がそのまま埋め込まれており、意味が見えます。関連語は methyl, thiol。
Methionine is a scientific formation built from meth-, referring to methyl, and thio-, from Greek theion, meaning "sulfur," plus the chemical ending -ine. The name was created to reflect the substance's chemical structure rather than an older everyday word. Related English forms include methyl and thiol.
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