Amide-containing amino acid
Alanine
Leucine
Asparagine
Serine
Anhydrous NH3 may replace alcohol from its combination with an amino acid in an amino acid ester so that an amide of amino acid and a molecule of free alcohol is produced. Asparagine is the amide formed from Aspaic acid.Ref: Textbook of medical biochemistry, MN Chatterji, 8th edition, page no: 80
Structure and function of protein