1
A
- Alanine, Ala
- nonpolar aliphatic R group
2
G
- Glycine, Gly
- Nonpolar, aliphatic R group
3
P
- Proline, Pro
- nonpolar aliphatic R group
4
V
- Valine, Val
- nonpolar, aliphatic R group
5
L
- Leucine, leu
- nonpolar aliphatic R group
6
I
- isoleucine, ile
- nonpolar aliphatic R group
7
M
- Methionine, met
- nonpolar aliphatic R group
8
S
- Serine, ser
- polar, uncharged R group
9
T
- Threonine, thr
- polar, uncharged R group
10
C
- Cysteine, cys
- polar uncharged R group
- pka:8.18
11
N
- Asparagine, asn
- polar uncharged R group
12
Q
- Glutamine, gln
- polar uncharged R group
13
F
- Phenylalanine, phe
- Aromatic R group
14
Y
- Tyrosine, Tyr
- Aromatic R group
- pKa: 10.07
15
W
- Tryptophan, trp
- Aromatic R group
16
D
- Aspartate (aspartic acid), asp
- Negatively charged R group
- pKa: 3.65
17
E
- Glutamate (glutamic acid), glu
- Negatively charged R group
- pKa: 4.25
18
K
- Lysine, lys
- Positively charged R group
- pKa: 10.53
19
R
- Arginine, arg
- positively charged R group
- pKa: 12.48
20
H
- Histidine, his
- positively charged R group
- pKa: 6.00