[gmx-users] a question about Electric fields

[BIRD]

hello all
I have some questions about add a voltage to a membrane with a protein system
1, how could i add a such as 30mv Electric fields in Z-axis(along the pore)
2, i used the Electric fields in mdp file to define Electric fields(E-z,0.03mv/nm) in z-axis but the subunit(five subunits in a protein)‍ are  move along the direction of Electric fields to another membrane(pbc. xyz) one by one( the whole protein could not stay here), why? how could i solve this problem?
best regard
Cao‍ Ph.D
 
Nankai University, Tianjin, China