What does asparagine mean?
Asparagine is a naturally occurring amino acid, one of the twenty standard building blocks of proteins and one of those directly specified by the genetic code, via the codons AAU and AAC. Classified as non-essential because the human body can synthesise it, it plays an important role in nitrogen metabolism and is especially abundant in plant proteins — it was first isolated from asparagus juice in the early nineteenth century, which explains its name. In medicine, asparagine has notable significance: certain leukaemias depend on an external supply of this amino acid, so the enzyme asparaginase, which destroys it, is used as a chemotherapy agent. The word belongs firmly to scientific and technical contexts, appearing in biochemistry textbooks, nutritional literature, and clinical research, and carries no figurative or colloquial usage. For readers interested in how chemistry and everyday foods intersect, asparagine is a quietly important example.
nounAsparagine is a non-essential amino acid, one of the twenty standard amino acids encoded by the genetic code, that occurs naturally in proteins such as those of asparagus.
- A non-essential amino acid (chemical formula C4H8N2O3), coded by the mRNA codons AAU and AAC, involved in protein synthesis and nitrogen metabolism.
"The enzyme asparaginase breaks down asparagine in the treatment of certain leukaemias."
"The enzyme asparaginase depletes asparagine in the blood as part of some leukaemia treatments."
"Because humans can synthesise asparagine themselves, it is classified as non-essential in the diet."
Rarely used; occasionally encountered in chemistry when referring to individual molecules or residues.
"The peptide chain contained three asparagines."
Asparagus owes its name to the same Latin root as this amino acid — chemists named the compound after the vegetable in which it was first identified.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of asparagine
Asparagine was first isolated from asparagus juice by French chemists Nicolas-Louis Vauquelin and Pierre Jean Robiquet in the early nineteenth century, and its name derives from the vegetable itself. The English word 'asparagus' comes from Latin asparagus, borrowed ultimately from Greek aspharagos, so the compound's name preserves that classical lineage. It was among the first amino acids ever discovered, predating the recognition of proteins' structure.
How asparagine is actually used
Strictly scientific register: asparagine appears almost exclusively in biochemistry, medicine, and nutrition writing rather than general prose. It is uncountable when treated as a substance but may be referred to as 'an asparagine residue' within proteins.
Easily confused with asparagine
Asparagine is the amide of aspartic acid, differing by an amide group in place of one hydroxyl group.
Glutamine is a structurally similar amino acid whose amide side chain is one carbon longer than that of asparagine.