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A GUIDE TO THE TWENTY COMMON AMINO ACIDSAMINO ACIDS ARE THE BUILDING BLOCKS OF PROTEINS IN LIVING ORGANISMS. THERE ARE OVER 500 AMINO ACIDS FOUND IN NATURE - HOWEVER, THE HUMAN GENETIC CODE
ONLY DIRECTLY ENCODES 20. ‘ESSENTIAL’ AMINO ACIDS MUST BE OBTAINED FROM THE DIET, WHILST NON-ESSENTIAL AMINO ACIDS CAN BE SYNTHESISED IN THE BODY.
BY NC ND
© COMPOUND INTEREST 2014 - WWW.COMPOUNDCHEM.COM | Twitter: @compoundchem | Facebook: www.facebook.com/compoundchemShared under a Creative Commons Attribution-NonCommercial-NoDerivatives licence.
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Alanine Aala
Glycine Ggly
ISOLEUCINE Iile
LEUCINE Lleu
PROLINE Ppro
VALINE Vval
PHENYLALANINE Fphe
TRYPTOPHAN Wtrp
TYROSINE Ytyr
ASPARTIC ACID Dasp
GLUTAMIC ACID Eglu
ARGININE Rarg
HISTIDINE Hhis
THREONINE Tthr
CYSTEINE Ccys
METHIONINE Mmet
ASPARAGINE Nasn
GLUTAMINE Qgln
ALIPHATIC AROMATIC SULFUR-CONTAININGACIDIC BASIC HYDROXYLIC
SERINE Sser
LYSINE Klys
AMIDIC
NH2
O
OH H2N
O
OHNH2
O
OH
NH2
O
OHNH
O
OH
NH2
O
OH
NH2
O
OH NH2
HN
OOH
NH2HO
O
OH
NH2O
O
O
OHNH2
O
O
O
OHNH2
NH
NH2
H2N
O
OH
NH2HN
N
O
OH
NH2
H3N
O
OH
NH2
HO
O
OH
NH2
OH O
OHNH2
HS
O
OHNH2
S
O
OHNH2O
H2N
O
OHNH2
O
H2N
O
OH
NON-ESSENTIAL ESSENTIALChart Key:
Note: This chart only shows those amino acids for which the human genetic code directly codes for. Selenocysteine is often referred to as the 21st amino acid, but is encoded in a special manner. In some cases, distinguishing between asparagine/aspartic acid and glutamine/glutamic acid is difficult. In these cases, the codes asx (B) and glx (Z) are respectively used.
three letter code
ChemicalStructure
NAME A
single lettercode
