This is an issue that we had noticed as well - that it did not seem intuitive to add resonances of a new peak to an existing spin system, unless at least one of its resonances is already part of it.
One way to do it is from the spectrum window: select the new peak along with a peak in the desired spin system, right click and select Assign::Add to Spinsystem. (Note that this only does anything if the new peak has resonances assigned to it)
Patrick
On Feb 3, 2012, at 11:48 AM, Nick Anthis wrote:
> Hi Everyone,
>
> I have a question about resonance assignments in Analysis.
>
> I'm trying to figure out how to add an unassigned resonance to a spin system, specifically a spin system that has not already been assigned to a definite reside (i.e. "{207}" or something like that). If I'm looking at a peak that is intra-residue in all dimensions, then I can easily do this in the Assignment Panel by clicking "Set Same Spin System". On the other hand, if I have a peak in a CBCA(CO)NH spectrum for example that corresponds to Ca-1, I can click on the 13C resonance, and I can set the type to CA. However, I can't seem to be able to either give this resonance a new spin system or assign it to another spin system. If I know that the i-1 spin system in this case is {478}, how do I let Analysis know this information?
>
> This seems like a pretty basic function that should be in the Assignment Panel, but I don't see a way to do this here. I can bring up the Selected Resonances panel, and there is an option at the bottom that says "Add to Spin System". When I click on it, the button changes to "Cancel Add". It also brings up "Resonance: Spin Systems", however no matter where I click on this window, it doesn't seem to add the resonance to a spin system. What am I missing? Am I doing something wrong? Is this a bug?
>
> I'm using Analysis 2.2.1, and I'm trying to set my project up to attempt to do some automated assignments in Mars. Any help would be very welcome!
>
> Thanks!
>
> Nick
>
> --
> Nick Anthis, DPhil
> Laboratory of Chemical Physics
> NIDDK, National Institutes of Health
> Bethesda, MD 20892-0520
> [log in to unmask]
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