Table 3 The partition coefficients (K values) of UstA in different solvent systems

Chloroform/Methanol/n-Butanol/H₂O

4:3:0.2:2

17

0

Ethyl acetate/n-Butanol/H₂O

4:1:5

12

0

Ethyl acetate/n-Butanol/Methanol/H₂O

4:1:0.5:6

9

0

n-Heptane/n-Butanol/Methanol/H₂O

2:4:1:4

11

0

MTBE/Acetonitrile/H₂O

2:2:3

7

0

n-Butanol/Acetic Acid/H₂O

4:1:5

23

0.13

n-Butanol/TFA/H₂O

1:0.01:1

14

0.11

n-Butanol/TFA/H₂O

1:0.02:1

13

0.35

n-Butanol/TFA/H₂O

1:0.05:1

14

0.62