Hi Phenix,<div><br></div><div>I have a hierarchy question.<br clear="all"><div> </div><div>I was using the hierarchy and got something that I did not expect. when running this:</div><div><br></div><div><div>  pdb_io = pdb.input(pdbfile)</div>

<div>  hierarchy = pdb_io.construct_hierarchy()</div><div>  </div><div>  for model in hierarchy.models():</div><div>    print <a href="http://model.id">model.id</a></div><div>    for chain in model.chains():</div><div>      print &#39;  &#39; + <a href="http://chain.id">chain.id</a> </div>

</div><div><br></div><div>When I do this I expect the chains in pdbfile to be printed once for each model in pdbfile. However, when I ran this I got, for example, chain &#39;A&#39; printed four times under the same model. Why is this? </div>

<div><br></div><div>Thanks,</div><div>Bradley</div>
</div>