Amino Acid Sidechain Categories

Non-polar, aliphatic side chains

1. Glycine, Gly, G

2. Leucine, Leu, L

3. Isoleucine, Ile, I

4. Alanine, Ala, A

5. Proline, Pro, P

6. Valine, Val, V

7. Methionine, Met, M

Aromatic R groups

1. Phenylalanine, Phe, F

2. Tyrosine, Tyr, Y

3. Tryptophan, Trp, W

Positively Charged R Groups

1. Lysine, Lys, K

2. Histidine, His, H

3. Arginine, Arg, R

Negatively Charged R Groups

1. Aspartame, Asp, D

2. Glutamate, Glu, E

Polar, uncharged R Groups

1. Serine, Ser, S

2. Threonine, Thr, T

3. Cysteine, Cys, C

4. Asparagine, Asn, N

5. Glutamine, Gln, Q