Asparagine
C₄H₈N₂O₃·132.118 g/mol·Amino Acids·CID 6267
Amino AcidHistorical
The amide derivative of aspartic acid and the first amino acid ever isolated (from asparagus, 1806). Its side chain is a common site for N-linked glycosylation — the attachment of sugar chains to proteins, critical for cell surface recognition.