STRUCTURES OF COMMON AMINO ACIDS

O

OH

NH

2

OH

O

NH

2

N

H

H

2

N

NH

H

2

N

O

OH

O

NH

2

O

HO

NH

2

O

OH

L-Alanine (Ala)

L-Arginine (Arg)

L-Asparagine (Asn)

L-Aspartic acid (Asp)

OH

O

NH

2

HS

OH

O

NH

2

O

NH

2

O

OH

NH

2

O

OH

O

OH

H

2

N

L-Cysteine (Cys)

L-Glutamine (Gln)

L-Glutamic acid (Glu)

Glycine (Gly)

N

N

H

O

HO

NH

2

O

OH

NH

2

O

OH

NH

2

O

OH

NH

2

H

2

N

L-Histidine (His)

L-Isoleucine (Ile)

L-Leucine (Leu)

L-Lysine (Lys)

O

OH

NH

2

S

O

OH

NH

2

N
H

OH

O

O

OH

NH

2

HO

L-Methionine (Met)

L-Phenylalanine (Phe)

L-Proline (Pro)

L-Serine (Ser)

O

OH

OH

NH

2

N

H

NH

2

OH

O

HO

NH

2

OH

O

OH

NH

2

O

L-Threonine (Thr)

L-Tryptophan (Trp)

L-Tyrosine (Tyr)

L-Valine (Val)

HO

O

NH

O

OH

O

HO

N

H

OH

O

O

NH

2

O

OH

H

2

N

O

OH

NH

2

O

OH

N-Acetylglutamic acid

N6-Acetyl-L-lysine

β-Alanine

2-Aminoadipic acid

OH

O

NH

2

OH

O

NH

2

H

2

N

O

OH

H

2

N

O

OH

DL-2-Aminobutanoic acid

DL-3-Aminobutanoic acid

4-Aminobutanoic acid

6-Aminohexanoic acid

O

OH

H

2

N

O

OH

NH

2

H

2

N

O

OH

O

H

2

N

OH

O

L-3-Amino-2-methylpropa-

noic acid

2-Amino-2-methylpropanoic

acid

5-Amino-4-oxopentanoic acid

5-Aminopentanoic acid

O

HO

NH

2

O

O

N

N

O

HO

NH

2

O

N

H

NH

2

NH

O

OH

H

2

N

O

OH

O

OH

N

N

H

O

OH

NH

O

H

2

N

Azaserine

Canavanine

L-γ-Carboxyglutamic acid

Carnosine

7-3

Section7.indb 3

5/3/05 7:45:27 AM

O

HO

NH

2

N

H

NH

2

O

HN

N

NH

2

OH

O

S

OH

O

NH

2

O

O

HO

HO

O

NH

2

S

S

NH

2

O

OH

Citrulline

Creatine

L-Cysteic acid

L-Cystine

OH

O

NH

2

H

2

N

Br

OH

Br

NH

2

O

HO

NH

2

OH

O

HO

I

I

HO

OH

NH

2

2,4-Diaminobutanoic acid

3,5-Dibromo-L-tyrosine

3,5-Diiodo-L-tyrosine

Dopamine

S

OH

O

NH

2

H

2

N

H

N

O

O

OH

HN

N

H

NH

2

OH

O

N

N

H

H

2

N

L-Ethionine

N-Glycylglycine

Guanidinoacetic acid

Histamine

OH

HS

O

NH

2

HO

S

S

OH

O

O

NH

2

NH

2

HO

OH

O

NH

2

N
H

OH

O

HO

L-Homocysteine

Homocystine

L-Homoserine

trans-4-Hydroxy-L-proline

HO

I

NH

2

OH

O

NH

2

O

OH

O

NH

2

HO

S

OH

O

NH

2

NH

2

O

NH

2

OH

O

HO

OH

L-3-Iodotyrosine

L-Kynurenine

L-Lanthionine

Levodopa

N

N

NH

2

HO

O

NH

2

OH

O

OH

O

NH

2

O

OH

NH

2

H

2

N

L-1-Methylhistidine

L-Norleucine

L-Norvaline

L-Ornithine

HO

P

O

O

HO

NH

2

OH

O

N

H

O

OH

O

H

N

OH

O

H

2

N

S

O

O

OH

O-Phosphoserine

L-Pyroglutamic acid

Sarcosine

Taurine

O

I

NH

2

HO

O

I

I

OH

I

L-Thyroxine

7-4

Structures of Common Amino Acids

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