Definition that contains essential amino acid
- lysine an essential amino acid found in proteins; occurs especially in gelatin and casein
- isoleucine an essential amino acid found in proteins; isomeric with leucine
- phenylalanine an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body
- histidine an essential amino acid found in proteins that is important for the growth and repair of tissue
- valine an essential amino acid found in proteins; important for growth in children and nitrogen balance in adults