just to confirm after one more test (for what it's worth - apologies, I'll 
stop sending large amounts of mail after this) - all the below is correct in 
11.1.25:

* with just the residue number and all CA's identified, ribbons et al work.

No "ALA", "CB", "MAIN" needed.

Thanks again,

VB

On Wednesday 21 March 2007 19:21, [EMAIL PROTECTED] wrote:

> >> (1) the pdb file contains the peptide identifier (ALA or the likes)
>
> Jmol does not use the ALA names -- these are too unpredictable. It uses
> the names of the atoms -- CA, N, O, etc. Particularly important is to
> label the alpha carbon CA.
>
> > Yes, I guess that's one of the keys.
> >
> >> (2) the pdb file assigns the peptide number to each atom
>
> I think it IS important that the residues be numbered, yes. 1 for all the
> atoms in the first residue, 2 for the next, etc. That field is critical.
>
> >> (3) there is a MAIN at the end of each line of the pdb file
> >
> > I don't think this is relevant.
>
> right, not relevant.
>
> >> (4) "CA" and "CB" are properly identified.
>
> CA is critical.
>
> > Likely
> >
> >> Since jmol is able to create the correct wireframe geometry for all
> >> these
> >
> > But wireframe, i.e. bond assignation, is only based on interatomic
> > distance.
> >
> >> molecules, it should not be too far a stretch to be able to identify the
> >> longest connected line in a wireframe, see whether the sequence
> >> is -CCN-CCN-CCN- ... in a certain segment, and attempt to auto-recognize
> >> a
> >> peptide backbone (and activate all the nice eye-candy).
>
> All that is needed is N and CA for this.
>


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