Hydrophobicity Indices for Amino Acids

Amino Acid

 Kyte-Doolittle

 Hopp-Woods

Alanine

 1.8

 -0.5

Arginine

 -4.5

 3.0

Asparagine

 -3.5

 0.2

Aspartic acid

 -3.5

 3.0

Cysteine

 2.5

 -1.0

Glutamine

 -3.5

 0.2

Glutamic acid

 -3.5

 3.0

Glycine

 -0.4

 0.0

Histidine

 -3.2

 -0.5

Isoleucine

 4.5

 -1.8

Leucine

 3.8

 -1.8

Lysine

 -3.9

 3.0

Methionine

 1.9

 -1.3

Phenylalanine

 2.8

 -2.5

Proline

 -1.6

 0.0

Serine

 -0.8

 0.3

Threonine

 -0.7

 -0.4

Tryptophan

 -0.9

 -3.4

Tyrosine

 -1.3

 -2.3

Valine

 4.2

 -1.5