Hello, Sorry, you cannot load a file describing a force field into Chimera. You can only use the force field that is already included. This is listed as one of the limitations of "Minimize Structure," along with a few more details: <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/minimize/minimize.h...

Sorry about that, Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Dec 27, 2009, at 9:04 AM, gytjyb wrote:

can i load a file about force field into chimera. if it is ture,i could chose other force field in chimera! how can i do? i just come from china and am poor in english and knowledge. thank for you help!