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The two amino acid residues are linked through a peptide bond. As both the amine and carboxylic acid groups of amino acids can react to form amide bonds, one amino acid molecule can react with another and become joined through an amide linkage. This polymerization of amino acids is what creates proteins.
AAindex is a database of amino acid indices, amino acid mutation matrices, and pair-wise contact potentials. [ 1 ] [ 2 ] The data represent various physicochemical and biochemical properties of amino acids and pairs of amino acids.
Fishes from a coral reef with diets containing different carbon sources also had variable amino acid δ 13 C values. [13] Furthermore, one study observed distinct amino acid isotopic compositions for desert C 3, C 4, and CAM plants. [14] These applications in diverse ecosystems highlight the versatility of compound-specific amino acid isotope ...
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Following is a table listing the one-letter symbols, the three-letter symbols, and the chemical properties of the side chains of the standard amino acids. The masses listed are based on weighted averages of the elemental isotopes at their natural abundances. Forming a peptide bond results in elimination of a molecule of water. Therefore, the ...
The "side chain" from the α carbon connects to the nitrogen forming a pyrrolidine loop, classifying it as a aliphatic amino acid. It is non-essential in humans, meaning the body can synthesize it from the non-essential amino acid L-glutamate. It is encoded by all the codons starting with CC (CCU, CCC, CCA, and CCG).