TABLE 2.

Numerical values of selected amino acid properties

Amino acid	Properties
	Molecular weight	Shapea	Flexibilityb	Hydrophobicityc	Isoelectric pointd
Ala	89	0	0	1.8	6.00
Arg	174	5	5	−4.5	11.15
Asp	133	2	2	−3.5	2.77
Glu	147	3	3	−3.5	3.22
Gly	75	0	0	−0.4	5.97
His	155	2	2	−3.2	7.47
Lys	146	0	4	−3.9	9.59
Phe	165	2	2	2.8	5.48
Ser	105	0	1	−0.8	5.68
Trp	204	2	2	−0.9	5.89
Tyr	181	2	2	−1.3	5.66
Val	117	1	1	4.2	5.96

^a Shape (position of branch point in a side chain) (42).

^b Flexibility (number of side chain dihedral angles) (42).

^c Hydrophobicity scale (43).

^d Isoelectric point (44).