From: Heather Carson (
Date: Wed Jan 24 2018 - 07:18:44 CST

I am trying to align two molecules but they have different numbers of
atoms. The main backbone is identical but the have a different length
hydrocarbon chain. I was wondering if it was possible to select a certain
range of atoms and align those? I am trying to do it via the tk consol but
I cant seem to select atoms number 40 to 62 (3 6 carbon rings which are
connected) and align those in each molecule.