Table 1.

Division of 20 amino acid types, based on dipoles and volumes of side chains

No.	Group	Dipolescale	Volumescale
C 0	A,G,V	Dipole <1.0	Volume <50
C 1	C	1.0< Dipole <2.0 (form disulphide bonds)	Volume >50
C 2	D,E	Dipole >3.0 (opposite orientation)	Volume >50
C 3	F,I,L,P	Dipole <1.0	Volume >50
C 4	H,N,Q,W	2.0< dipole <3.0	Volume >50
C 5	K,R	Dipole >3.0	Volume >50
C 6	M,S,T,Y	1.0< dipole <2.0	Volume >50