Hello,

I have an alpha-lactose as ligand in my model. It is possible that the glucose ring of alpha-lactose is opened since I do not see the whole density of ring and there are an extend density after C2’ of the glucose molecule. Does anyone know how to cleave the covalent between O’ and C1’ to form linear glucose in coot or should I build a new ligand from beginning (beta-galactose cyclic forming beta-1-4 glycosidic linkage with a linear glucose) in coot  ? 

Thank you in advance

Hang Pham