[modeller_usage] Heme in P450

["Storbeck, K, Dr <storbeck AT sun.ac.za>" <storbeck AT sun.ac.za>]

Hi,

I am modeling a cytochrome P450, I am able to include the heme in my model. However, in the templates the heme iron is bound to a cys residue, but I loose this bond in the model. How can I go about keeping it in my model?

Thanks
Karl