Amino Acids - Abbreviation and R-group Functionality

H

Histidine, essential, weakly basic

I (uppercase i)

Isoleucine, essential, nonpolar and hydrophobic

L

Leucine, essential, nonpolar and hydrophobic

A

alanine, nonpolar and aliphatic

R

arginine, basic

N

asparagine, polar

D

aspartic acid, acidic and negatively charged

C

cysteine, polar

Q

glutamine, polar and uncharged

E

glutamic acid, acidic and negatively charged

G

glycine, nonpolar and very flexible

K

lysine, essential, basic and positively charged

M

methionine, essential, nonpolar

F

phenylalanine, essential, nonpolar and aromatic

P

proline, nonpolar and rigid

S

Serine, polar and uncharged

T

threonine, essential, polar and uncharged

W

tryptophan, essential

Y

tyrosine

V

valine, essential

U

selenocysteine