Table 1:
Ion selectivity of OmpF (WT and mutants) in KCl and CaCl
2
.
OmpF channel
Δ
𝑞
*
RP (mV)
1/0.1 M KCl
RP (mV)
1/0.1 M CaCl
2
Selectivity inversion
WT
0
−
2
5
.
4
±
0
.
8
2
2
.
1
±
0
.
7
Yes
CC
+2
−
2
3
.
8
±
0
.
8
3
0
.
1
±
1
.
1
Yes
RR
+4
3
1
.
9
±
1
.
0
3
5
.
4
±
1
.
7
No
* Δ
q
: effective charge compared to WT OmpF.