Hello All,
 
Is there a way to show the three dimesional (x, y, z) coordinates for a selected alpha carbon? 
 
Lets say that you have two homologous structures aligned; one crystal structure  in unbound state and the other in agonist bound state.  How would you show the movement (change in positon of a residue) between the two states. 
 
Thanks for your help.
 
Ron