On Jun 8, 2007, at 12:06 AM, bala wrote:

Hi Elaine, Thank you for your inputs. I think i didnt mention my second query reg. substructure creation clearly, I hve a 20 mer duplex RNA, i want to visualize only a few base pairs at the middle. Is there any way that i can select, display and do actions only the portion of interest and undisplay other portion Bala

Hi Bala, Of course. The general procedure is to (1) select what you are interested in (2) invert the selection so now it contains only what you are *not* interested in (3) hide or delete the selection (if you're confident you won't want the other parts, deleting will make later steps simpler) (4) if you only hid rather than deleting, now select the parts of interest again, and use the Actions menu to work with those parts There are many different ways to do each step, too many to describe in this mail. Below, I'll just give an example using commands, but be aware that selection can also be done with Ctrl-click and arrow key operations, or with the Select menu, or using the Sequence tool: http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/selection.html http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/seqpanel.html Commands example: open 6bna sel :4-8.a,5-9.b sel invert delete sel Then carry on with what is left, using commands or the menu as you prefer. I hope this helps, 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