Hi John, Sorry, currently Glycam isn't included in the parameter lookup by Chimera. Here are details on which parameter files are used for each of the force field choices: <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/minimize/minimize.html#limitations> You can assign charges manually, but it is more labor-intensive: <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/minimize/minimize.html#user-specified> Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Dec 26, 2012, at 11:27 PM, john Kerk wrote:
Dear Users I want to assign the partial charges of a glucose molecule using chimera-1.7 but I can not find this force field in Add charge suite although the GLYCAM force field files are existing under amber12. can I get help wishing merry Christmas , John