Oliver, Thanks for the reply. I am familiar with the widget. But that wouldn't restrain (rather than constrain) the other atoms. Perhaps just fixing ends will work. I'll have to play around with it next time I'm fitting. Many thanks for your ideas.
-Mark _______________________________________________ Mark A. Saper, Ph.D. Associate Professor of Biological Chemistry, U-M Medical School 3040 Chemistry Building | [email protected] | +1 (734) 764-3353
