This atom specifier will select the nitrogen of the initial residue of each chain: protein & @n & @/idatmType=N3+ It kind of sounds like you may already know your way around a script. Let me know if you need more help with the scripting than the above. --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu On Jan 6, 2012, at 11:13 AM, michel dedeo wrote:
Hi,
I'm trying to measure the distance between the N-termini (or the first known residue) of a batch of dimeric proteins. The two proteins are different chains. I know how to do this by hand, but am exploring different ways to script it. It may be best to avoid using chimera entirely, but I thought I'd check to see if anyone knows a clever way to select the residue closest to the N-terminus when it's not residue #1.
Thanks for your help.
Michel _______________________________________________ Chimera-users mailing list Chimera-users@cgl.ucsf.edu http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users