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

1. an essential amino acid found in proteins; important for growth in children and nitrogen balance in adults