General Properties of Amino Acids

Name

Symbol

MW

MW (-H2O)

Structure

Solubility (g/100 mL H2O at 25C)

UV Abs Log e (lmax)
pH ~ 7.0

Three Letter Code

One Letter Code

Alanine

Ala

A

89.09

71.08

 

 

16.65

 

Arginine

Arg

R

174.20

156.19

 

 

15

 

Asparagine

Asn

N

132.12

114.10

 

 

3.53

 

Aspartic Acid

Asp

D

133.10

115.09

 

 

0.778

 

Cysteine

Cys

C

121.15

103.15

 

 

very soluble

2.46
(250 nm)

Glutamic Acid

Glu

E

147.13

129.12

 

 

0.864

 

Glutamine

Gln

Q

146.15

128.13

 

 

2.5

 

Glycine

Gly

G

75.07

57.05

 

 

24.99

 

Histidine

His

H

155.16

137.14

 

 

4.19

3.77
(211 nm)

Isoleucine

Ile

I

131.17

113.16

 

 

4.117

 

Leucine

Leu

L

131.17

113.16

 

 

2.426

 

Lysine

Lys

K

146.19

128.17

 

 

very

soluble

 

Methionine

Met

M

149.21

131.20

 

 

3.381

 

Phenylalanine

Phe

F

165.19

147.18

 

 

2.965

3.97
(206 nm)
2.30
(257 nm)

Proline

Pro

P

115.13

97.12

 

 

162.3

 

Serine

Ser

S

105.09

87.08

 

 

5.023

 

Threonine

Thr

T

119.12

101.11

 

 

very

soluble

 

Tryptophan

Trp

W

204.23

186.21

 

 

1.136

4.67
(219 nm)
3.75
(280 nm)

Tyrosine

Tyr

Y

181.19

163.18

 

 

0.0453

3.90
(222 nm)
3.15
(274 nm)

Valine

Val

V

117.15

99.13

 

 

8.85

 


 

References

  1. The Merck Index, Merck & Co., Inc., Whitehouse Station, NJ 12 (1996).
  2. CRC Handbook of Chemistry and Physics, CRC Press, Inc., Cleveland, OH, 58 (1977).