Essential amino acid

Abstract

Amino acids are the building blocks for tissue protein in all animals. They are classified into two traditional subgroups: essential and nonessential. Essential amino acids are defined as those amino acids that cannot be synthesized solely using existing metabolites and enzymes within the body (de novo) and therefore require a dietary source. As novel functions of amino acids have been discovered, the classification of amino acids has expanded beyond the classic definitions of “essential” and “nonessential” to assess dietary need for optimal growth, development, reproduction, and immune function.

HO● ‐ initiated oxidation of isoleucine amino acid in the aqueous phase

“…[ 2 ] Among them, only 20 α‐amino acids play the role of building blocks of proteins and are necessary for the normal physiological functions of cells. [ 3 ] All amino acids, except for glycine, have the L‐configuration in free form. [ 4 ] Essential and non‐essential amino acids are two main types of natural α‐amino acids, [ 5 ] which play an important role in metabolism, neurotransmitters, and intercellular signaling.…”

“…[19][20][21][22][23]24,27] The human body cannot synthesize Ile, which must come from the diet. [3] In nature, Ile is generally found in meat, fish, poultry, eggs, cheese, lentils, nuts, and seeds. [26] The free Ile commonly exists in both neutral and zwitterionic forms (figures 1A and 1B).…”