On Thu, 16 Oct 2008, Patrick Loll wrote: > Where/how do I invoke this modification? I.e., how do I tell the > refinement program that a particular sugar is an alpha, and not a beta, > mannose? take a quick look at : http://www.phenix-online.org/pipermail/phenixbb/2008-June/001080.html not sure about alpha/beta. HTH -bryan