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Star Republic: Guide for Biologists

Hydrophilicity index of amino acids

Name

Single-letter code

Hopp-Woods Hydrophilicities

Kyte-Doolittle Hydrophilicities

Scaled Hydrophobicity Score

Alanine

A

-0.5

-1.8

0.616

Cysteine

C

-1

-2.5

0.68

Aspartate

D

3

3.5

0.028

Glutamate

E

3

3.5

0.043

Phenylalanine

F

-2.5

-2.8

1

Glycine

G

0

0.4

0.501

Histidine

H

-0.5

3.2

0.165

Isoleucine

I

-1.8

-4.5

0.943

Lysine

K

3

3.9

0.283

Leucine

L

-1.8

-3.8

0.943

Methionine

M

-1.3

-1.9

0.738

Asparagine

N

0.2

3.5

0.236

Proline

P

0

1.6

0.711

Glutamine

Q

0.2

3.5

0.251

Arginine

R

3

4.5

0

Serine

S

0.3

0.8

0.359

Threonine

T

-0.4

0.7

0.45

Valine

V

-1.5

-4.2

0.825

Tryptophan

W

-3.4

0.9

0.878

Tyrosine

Y

-2.3

1.3

0.88