Definition of cysteine in English:

cysteine

noun ˈsɪstɪɪnˈsɪstɪiːnˈsɪstiːnˈsɪsteɪnˈsistəˌēn

mass nounBiochemistry

A sulphur-containing amino acid which occurs in keratins and other proteins, often in the form of cystine, and is a constituent of many enzymes.
Chemical formula: HSCH₂CH(NH₂)COOH
Example sentencesExamples
- As long as the supply of methionine is adequate, cysteine is considered as nonessential.
- The integration of reduced sulphur into the amino acid cysteine is a central step in the assimilation of inorganic sulphur.
- Whey proteins are also rich in the sulfur-containing amino acids cysteine and methionine.
- Most of the sulfate substrate comes from sulfoxidation of the amino acid cysteine.
- The gelatinase activity was due to metalloproteinases and not cysteine or serine proteinases.

Origin

Late 19th century: from cystine + -eine (variant of -ine⁴).

Definition of cysteine in US English:

cysteine

nounˈsistəˌēn

Biochemistry

A sulfur-containing amino acid which occurs in keratins and other proteins, often in the form of cystine, and is a constituent of many enzymes.
Chemical formula: HSCH₂CH(NH₂)COOH
Example sentencesExamples
- The gelatinase activity was due to metalloproteinases and not cysteine or serine proteinases.
- The integration of reduced sulphur into the amino acid cysteine is a central step in the assimilation of inorganic sulphur.
- Whey proteins are also rich in the sulfur-containing amino acids cysteine and methionine.
- Most of the sulfate substrate comes from sulfoxidation of the amino acid cysteine.
- As long as the supply of methionine is adequate, cysteine is considered as nonessential.

Origin

Late 19th century: from cystine + -eine (variant of -ine).

单词	cysteine
释义	Definition of cysteine in English: cysteine noun ˈsɪstɪɪnˈsɪstɪiːnˈsɪstiːnˈsɪsteɪnˈsistəˌēn mass nounBiochemistry A sulphur-containing amino acid which occurs in keratins and other proteins, often in the form of cystine, and is a constituent of many enzymes. Chemical formula: HSCH₂CH(NH₂)COOH Example sentencesExamples As long as the supply of methionine is adequate, cysteine is considered as nonessential. The integration of reduced sulphur into the amino acid cysteine is a central step in the assimilation of inorganic sulphur. Whey proteins are also rich in the sulfur-containing amino acids cysteine and methionine. Most of the sulfate substrate comes from sulfoxidation of the amino acid cysteine. The gelatinase activity was due to metalloproteinases and not cysteine or serine proteinases. Origin Late 19th century: from cystine + -eine (variant of -ine⁴). Definition of cysteine in US English: cysteine nounˈsistəˌēn Biochemistry A sulfur-containing amino acid which occurs in keratins and other proteins, often in the form of cystine, and is a constituent of many enzymes. Chemical formula: HSCH₂CH(NH₂)COOH Example sentencesExamples The gelatinase activity was due to metalloproteinases and not cysteine or serine proteinases. The integration of reduced sulphur into the amino acid cysteine is a central step in the assimilation of inorganic sulphur. Whey proteins are also rich in the sulfur-containing amino acids cysteine and methionine. Most of the sulfate substrate comes from sulfoxidation of the amino acid cysteine. As long as the supply of methionine is adequate, cysteine is considered as nonessential. Origin Late 19th century: from cystine + -eine (variant of -ine).
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