GES scale from Engelman et al, Ann Rev. Biophys. Chem. 115; 321-53 986  
Table 1, Page 330 Columns 1 and 4

Support for ambiugous and terminator characters:

B = (D + N) / 2
Z = (E + Q) / 2
X = 0.0           Note: Sum of all residues in column/20 = 13.7!!
* = X

Residue     Water-Oil  ..

A           -1.6
B            7.0
C           -2.0
D            9.2
E            8.2
F           -3.7
G           -1.0
H            3.0
I           -3.1
K            8.8
L           -2.8
M           -3.4
N            4.8
P            0.2
Q            4.1
R           12.3
S           -0.6
T           -1.2
V           -2.6
W           -1.9
X            0.0
Y            0.7
Z            6.15
 *            0.0