Hi Martin,
So it seems I was right :D
ID is an atomic property, read from the PDB file, whereas index is an
'internal' identifier. Following Jasons comments, ID is not changed upon
additions/deletions, whereas index does.
For your purpose, you probably want to make sure that the IDs are identical
for corresponding atoms.
Hope it helps,
Tsjerk
On Oct 31, 2010 3:35 PM, "Martin Hediger" <ma....@bluewin.ch> wrote:
Hey, Thanks for your earlier response on the issue.
Its quite important to me right now, since I am trying to interpolate
between two states of the same structure and therefore (let me call it
'physical') atom numbering has to be perfectly identical.
I looked into it but i cant quite get my following observation into
agreement with what you said.
I have a PDB file with 920 atoms. Starting from the top, with no 'TER' or
'MODEL' or other PDB syntax elements, on line 909 of that file an ATOM is
stated (hydrogen), with the number '909' at the "line-909".split()[1]
position.
When I open the file in PyMOL and let it display LABELS>ATOM_IDENTIFIERS>ID,
I get '909' displayed in the model. Changing the value at '909' in the PDB
file to 950, reloading and redisplaying the 'ID' labels, presents '950' also
in the PyMOL viewer, even if the ATOM is still on line 909 in the PDB file.
How can this behavior be explained with regard to what we were talking about
previously? What label-type is required to display the actual,
non-label-dependent index of the atom in the system? Does the functionality
depend on whether there are more detailed atom descriptors available, like
residue type or chain id?
Thanks one more time for any help on this.
Martin
Am 25.10.10 17:03, schrieb Jason Vertrees:
> > Hi Martin& Tsjerk, > > There is a another difference between the two
aside from the > off-by-o...
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