I used the fullerene C60 to represent protein/nanoparticle in my simulation. It means one protein 60 particles. I defined these 60 particles as a group.
But the group number is limited to 32. The reson i use C60 as a protein is that i need a kind of protein/nanoparticle is charged into some different patches.
If I want to put more groups into my simulation, what should i do?? Any suggestion to this problem is