Hi Bala, Currently there is no way to draw a ribbon or smooth tube for P-only nucleic acid chains. It is the same situation as for the CA-only peptide chains. There is already a request (#3781) in our tracking database to allow drawing ribbons for CA-only peptides, and you are on the notification list for when something is done about this. I will update that request to mention P-only nucleic acid chains, and that a tube (which does not require calculation of residue orientations) may suffice. I can only suggest showing the P-trace as sticks, which I agree does not look as nice as a smooth tube. Best, Elaine ----- Elaine C. Meng, Ph.D. meng@cgl.ucsf.edu UCSF Computer Graphics Lab and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco http://www.cgl.ucsf.edu/home/meng/index.html On Dec 13, 2008, at 6:55 AM, Bala subramanian wrote:

Hello all,

I have a pdb file of a RNA duplex containing only the Phosphate atoms. How to make chimera to draw the ribbon representation. This is possible in vmd by using Tube as graphic style but i want to know if i can make it in Chimera too.

Bala _______________________________________________ Chimera-users mailing list Chimera-users@cgl.ucsf.edu http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users