[gmx-users] a question on g_hbond

[Acoot Brett]

Dear All,

I have a protein complex PDB composed of chain A and Chain B. I want to dtermine the hydrogen bonds between chain A and chain B.

By g_hbond it request me to input the group twice. But both chain A and chain B belong to group "protein". In this situation how can I determine the hydrogen bond between chain A and B? 

And if I want to which donor and acceptor form a hydrogen bond, which option of the g_hbond command has this function?

I am looking forward to getting your reply.

Cheers,

Acoot