Amino Acids: Their Properties and Structures

Nonpolar (hydrophobic)

amino acid three letter code single letter code
glycine Gly G
alanine Ala A
valine Val V
leucine Leu L
isoleucine Ile I
methionine Met M
phenylalanine Phe F
tryptophan Trp W
proline Pro P

 

Polar (hydrophilic)

serine Ser S
threonine Thr T
cysteine Cys C
tyrosine Tyr Y
asparagine Asn N
glutamine Gln Q

 

Electrically Charged (negative and hydrophilic)

aspartic acid Asp D
glutamic acid Glu E

 

Electrically Charged (positive and hydrophilic)

lysine Lys K
arginine Arg R
histidine His H


Yellow amino acids contain sulfur.
Blue amino acids can be phosphorylated .

 


Nonpolar (hydrophobic)

glycine
alanine
valine
leucine


 

 

isoleucine
methionine
phenylalanine

 

 

tryptophan
proline

Polar (hydrophilic)

serine
threonine
cysteine

 

 

tyrosine
asparagine
glutamine

 

 


Electrically Charged (negative and hydrophilic)

aspartic acid
glutamic acid

 

 


Electrically Charged (positive and hydrophilic)

lysine
arginine
histidine



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