[ccp4bb] ccp4mg question

[SANCHEZ BARRENA, MARIA JOSE]

Dear all, 
I am working with a cyclic protein and I am trying to make a figure with 
ccp4mg. I would like to know how to say to ccp4mg that the N and C-terminus are 
bound.... Although atoms are at a covalent bond distance, the chain is broken 
by ccp4mg... 
Many thanks in advance for your suggestions and help! 
Maria