Amino Acids

Amino acids with non polar side chains

• Glycine

• Leucine

• Alanine

• Methionine

• Valine

• Isoleucine

• Proline

• Phenylalanine

• Tryptophan

Amino acids with polar, uncharged side chains

• Serine

• Threonine

• Cysteine

• Tyrosine

• Asparagine

• Glutamine

Amino acids with polar, positively charged side chains

• Lysine

• Arginine

• Histidine

Amino acids with polar, negatively charged side chains

• Aspartate/Aspartic acid

• Glutamate/Glutamic acid

Glycine

Alanine

Valine

Leucine

Isoleucine

Methionine

Proline

Phenylalanine

Tryptophan

Serine

Threonine

Cysteine

Tyrosine

Asparagine

Glutamine

Lysine

Arginine

Histidine

Aspartate/Aspartic Acid

Glutamate/Glutamic acid

Ala

Alanine

Arg

Arginine

Asn

Asparagine

Asp

Aspartate/Aspartic Acid

Cys

Cysteine

Gln

Glutamine

Glu

Glutamate/Glutamic acid

Gly

Glycine

His

Histidine

Ile

Isoleucine

Leu

Leucine

Lys

Lysine

Met

Methionine

Phe

Phenylalanine

Pro

Proline

Ser

Serine

Thr

Threonine

Trp

Tryptophan

Tyr

Tyrosine

Val

Valine

Asx

Asparagine or Aspartic acid

Glx

Glutamine or glutamic acid

A

Alanine

R

Arginine

N

Asparagine

D

Aspartic Acid

C

Cysteine

Q

Glutamine

E

Glutamic Acid

G

Glycine

H

Histidine

I

Isoleucine

L

Leucine

M

Methionine

F

Phenylalanine

P

Proline

S

Serine

T

Threonine

W

Tryptophan

Y

Tyrosine

V

Valine

B

Asparagine or Aspartic acid

Z

Glutamine or glutamic acid

K

Lysine

Arginine R group pka

12.48

Aspartic Acid R group pka

3.65

Cysteine R group pka

8.18

Glutamic acid R group pka

4.25

Histidine R group pka

6.00

Lysine R group pka

10.53

Tyrosine R group pka

10.07

Carboxy terminus pka (for single amino acid)

about 2-2.5

Amino terminus pka (for single amino acid)

about 9.5

pka of animo terminus in peptide

8.5

pka of carboxy terminus in a peptide

3.5