Amino Acid Code Table

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Overview

GenScript offers a variety of peptide synthesis services with both natural and non-standard/unnatural amino acids. To order our Custom Peptides and Peptide Library services through our online ordering system, refer to the following list of amino acid codes below. You can use either the single or multiple letter codes, but make sure to include braces if using the multiple code. You can also find symbols and molecular features of each natural amino acid in our Reference Table.

Related Tools

 Peptide Chemical Formula and Molecular Weight Calculator

 Chart of Amino Acid Structure

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Name	Single Letter Code	Multiple Letter Code	D-Amino Acid Code
Alanine	A	{ALA}	{d-ALA}
Arginine	R	{ARG}	{d-ARG}
Asparagine	N	{ASN}	{d-ASN}
Aspartic Acid	D	{ASP}	{d-ASP}
Cysteine	C	{CYS}	{d-CYS}
Glutamic Acid	E	{GLU}	{d-GLU}
Glutamine	Q	{GLN}	{d-GLN}
Glycine	G	{GLY}
Histidine	H	{HIS}	{d-HIS}
Isoleucine	I	{ILE}	{d-ILE}
Leucine	L	{LEU}	{d-LEU}
Lysine	K	{LYS}	{d-LYS}
Methionine	M	{MET}	{d-MET}
Phenylalanine	F	{PHE}	{d-PHE}
Proline	P	{PRO}	{d-PRO}
Serine	S	{SER}	{d-SER}
Threonine	T	{THR}	{d-THR}
Tryptophan	W	{TRP}	{d-TRP}
Tyrosine	Y	{TYR}	{d-TYR}
Valine	V	{VAL}	{d-VAL}

Special Amino Acids

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