Building models in PDB format!

[Raghavender Pillutla]

Hello Everybody,

I am trying to build shape models of some plasma proteins. Basically,
I am just interestedin the overall shape of the protein. I would like 
to know what all information I need to know get the model in a PDB 
format (the .pdb extension). Also, I would like to know whether I need
a specific software for building the model. Can someone help me? 
Thanks in Advance,

Raghav