1. Nonpolar
   1. Glycine G
      1. MW最小, beta- turn常見
   2. Tryptophan W
   3. Alanine A
   4. Proline P
      1. beta-turn 常見, 會打斷alpha helix
   5. Valine V
   6. Leucine L
   7. Isoleucine I
   8. Phenylalanine F
   9. Metionine M
      1. 含S
2. Polar
   1. Cysteine C
      1. 含S, 與雙硫鍵形成有關
   2. Threonine T
   3. Serine S
   4. Asparagine N
   5. Glutamine Q
   6. Tyrosine Y
3. 圖例
   1. 必須胺基酸
   2. 半必須胺基酸
   3. 與phosphorylation有關
   4. 與hydroxylation有關
4. Acid
   1. Aspartic acid D
   2. Glutamic acid E
5. Base
   1. Lysine K
   2. Arginine R
   3. Histidine H
      1. 在原核的phosphorylation