Polarity classification of the side chain groups of amino acids

- May 03, 2018-

Non-polar amino acids (hydrophobic amino acids) 8 species

Alanine (Ala)

Valine (Val)

Leucine (LEU)

Isoleucine (Ile)

Proline (Pro)

Phenylalanine (Phe)

Tryptophan (TRP)

Methionine (Met)

Polar amino acids (hydrophilic amino acids):

Polarity without charge: 7 kinds

Glycine (gly)

Serine (Ser)

Threonine (THR)

Cysteine (Cys)

Tyrosine (Tyr)

Aspartic amide (ASN)

Glutamine (GLN)

Polar positively charged amino acids (basic amino acids) 3 lysine (Lys) arginine (ARG) histidine (HIS) Polar negatively charged amino acids (acid amino acids) 2 species of aspartic acid (ASP) glutamate (Glu