valine
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Definition
Noun: * An essential amino acid found in proteins; important for growth in children and nitrogen balance in adults. It is one of the branched-chain amino acids (BCAAs).
Usage
"Valine" is used as a countable noun, typically in scientific, nutritional, and biochemical contexts. It refers to a specific organic compound. * It is often discussed alongside other essential amino acids like leucine and isoleucine. * It is commonly mentioned in relation to protein synthesis, muscle metabolism, and dietary requirements.
Examples
- The nutritional supplement is rich in valine and other branched-chain amino acids.
- A deficiency in valine can impair growth and nitrogen equilibrium.
- This protein sequence contains several valine residues.
Advanced Usage
- In Biochemistry: Valine is denoted by the three-letter code "Val" or the single-letter code "V" in protein sequences and genetic codes.
- Example: The mutation replaced a glutamic acid with a valine at position 6.
- In Nutrition/Dietetics: Often discussed in terms of dietary sources (e.g., meat, dairy, soy) and recommended daily intake.
- Example: Athletes may monitor their valine intake to support muscle recovery.
Variants and Related Words
- L-valine (n): The specific, biologically active form of valine found in proteins and used by the human body.
- Branched-chain amino acid (BCAA) (n): A category that includes valine, leucine, and isoleucine.
Synonyms
- Amino acid (n, general class): Valine is a specific type of amino acid. More precise synonyms are its scientific designations (e.g., 2-amino-3-methylbutanoic acid).
Notes
- As an essential amino acid, valine cannot be synthesized by the human body and must be obtained from the diet.
- The term is almost exclusively used in technical contexts and is not common in everyday conversation.
Noun
- an essential amino acid found in proteins; important for growth in children and nitrogen balance in adults