[gmx-users] Re: Help needed on using general amber force field (GAFF)

2008-03-31 Thread servaas michielssens
chemical chemical calculation or use equivalent parameters. (but this is more a topic for the amber mailing list...) kind regards, servaas Message: 6 Date: Mon, 31 Mar 2008 10:25:17 -0400 From: "Xiangyu Fan" <[EMAIL PROTECTED]> Subject: Re: [gmx-users] Re: Help needed on using gen

Re: [gmx-users] Re: Help needed on using general amber force field (GAFF) in Gromacs

2008-03-31 Thread Xiangyu Fan
Hi Servaas, Thanks for your reply. Your inforamtion is very helpful. Now I am trying to write the topology file by myself when dealing with a small molecule. I have know their conversion relationship, but in my case, I want to fix a few atoms in a plane. From the gaff.dat file , I can see the pa

[gmx-users] Re: Help needed on using general amber force field (GAFF) in Gromacs

2008-03-14 Thread servaas michielssens
I don't think you can generate your topology from the pdb file with gromacs in this case (with gaff). You can first make it in amber and than convert it to gromacs. On this website is the info you need, in the FAQs there is a link to dowload the script to do the job. http://chemistry.csulb.edu/ffam