I have to simulate DPPC+Water. For that I am using a surfactant SDS. I have downloaded .itp file of surfactants. But I need a gro file(coordinate file). How I get that file for SDS?
from this link I have downloaded .itp file. For SDS there are four beads. SO3,C1,C2,C3. So I can not generate any gro file. Which is for this topology.
But on the martini site there is a special tool , which can create gro file from itp.