Nguyen Hoang Phuong wrote: > Dear All, > > Does anyone have the topology file of the NMA molecule? Thanks for any > help in advance!. > Hi Phuong, I think NMA is the same as NAC, at least that was the way I understood it when I implemented the OPLS-AA/L stuff. Check the *.rtp files to see if NAC matches the atoms! Cheers, Erik