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Definition of Asparagine
Medically reviewed by Min Clinic Staff | Updated: January 2026
Asparagine: An amino acid, one of the 20 building blocks of protein. Asparagine is nonessential to the diet since the body can synthesize it. Asparagine is important to the metabolism of ammonia. It was the first amino acid to be isolated from a natural source, asparagus juice (1806). Symbol: Asn.