The 20 proteinogenic amino acids

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All 20 amino acids, represented by the ball-and-stick model.
Colors: Carbon (C) black, Nitrogen (N) blue, Oxygen (O) red, Hydrogen (H) white, Sulfur (S) yellow.
The Carboxy- and Aminogroup is turned to the bottom, so that the characteristic functional group fills the upper part of the picture.

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1
Alanine
(A, Ala)
Alanine C3H7NO2

2
Arginine
(R, Arg)
Arginine C6H14N4O2

semiessential

3
Asparagine
(N, Asn)
Asparagine C4H8N2O3

4
Aspartic acid
(D, Asp)
Aspartic acid C4H7NO4

5
Cysteine
(C, Cys)
Cysteine C3H7NO2S

6
Glutamic acid
(E, Glu)
Glutamic acid C5H9NO4

7
Glutamine
(Q, Gln)
Glutamine C5H10N2O3

8
Glycine
(G, Gly)
Glycine C2H5NO2

9
Histidine
(H, His)
Histidine C6H9N3O2

semiessential

10
Isoleucine
(I, Ile)
Isoleucine C6H13NO2

essential

11
Leucine
(L, Leu)
Leucine C6H13NO2

essential

12
Lysine
(K, Lys)
Lysine C6H14N2O2

essential

13
Methionine
(M, Met)
Methionine C5H11NO2S

essential

14
Phenylalanine
(F, Phe)
Phenylalanine C9H11NO2

essential

15
Proline
(P, Pro)
Proline C5H9NO2

16
Serine
(S, Ser)
Serine C3H7NO3

17
Threonine
(T, Thr)
Threonine C4H9NO3

essential

18
Tryptophan
(W, Trp)
Tryptophan C11H12N2O2

essential

19
Tyrosine
(Y, Tyr)
Tyrosine C9H11NO3

20
Valine
(V, Val)
Valine C5H11NO2

essential